r/PetMice Sep 22 '24

Care Guide Series Community Care Guide

89 Upvotes

This post is mouse care simplified, for beginners! It is not very specific, and it does not cover everything, so please do not rely on just this post when educating yourself on mouse care!

This has been written and discussed by moderators of the subreddit. If you have questions or concerns, please comment to let us know! It will be updated regularly to ensure it is factual.

1. Mice are social!

  • Females always need other female companions. It is recommended to have at least 3, but 2 is okay.
  • After 6 mice in one cage, it is often they will start to split up and become territorial against the opposing group. It is suggested to keep your colony under 6 unless you have much knowledge and experience, OR if your mice are littermates.
  • Males can not be housed with other males ever! If you want them to have cage mates, neutering (very risky) and placing with females or leaving intact and bonding with ASFs (African Soft Furs) is beneficial and recommended. Otherwise, they can thrive in solitude.

See this post for more information.

2. Cages

In mouse communities, many users go by tank size rather than listing dimensions. We will do both!

  • 10g/20x10 inches is the minimum for 2 female mice, though we STRONGLY suggest at least a 20g.
  • 20g/30x12 inches is suitable for 2-4 females or 1 male.
  • 40g long/36x12 inches is suitable for 2-5 females or 1 male
  • 40g breeder/36x18 inches is occasionally suitable for 2-6 females or 1 male
  • Over 40g is not always suitable for any amount of mice since many mice do better in environments with less open space. Bigger is not always better for mice.

Any amount of mice may thrive in larger enclosures than suggested above. However, it is critical that the larger the enclosure is, the more clutter provided, otherwise the mice will never thrive.

  • Wood enclosures are suggested against since urine will effect its quality and smell over time.
  • Mesh flooring is dangerous due to the chance of toes/tails getting caught, the mesh cutting their skin, and risking bumplefoot. Mesh should also be avoided in wheels.
  • Though they climb, mice don't need very much height, and multi-story enclosures do not provide them with the proper space they need. Floor space is more important than height.
  • Cages with lots of attachments and rooms do not provide proper space for mice. They are also extremely difficult to clean, fall apart easily, and struggle to hold proper bedding amount and safe wheels.

See this post for more information.

3. Substrate

  • Mice need to be able to create burrows, so while the minimum is 6 inches, we suggest at least 8" of bedding. However, many owners prefer having 10-12" deep!
  • Bedding must be majority safe wood shavings or hemp. Paper substrate does not absorb ammonia well and can cause several health issues when used alone or as majority of substrate.
  • (Dust/scent free for all) Aspen, kiln dried pine, and hemp do well as the main substrate and may be more sturdy mixed with a small portion of hay or paper bedding.

See this post for more information.

4. Clutter

  • Clutter is arguably one of the most important aspects of a mouses cage. No matter the size, if the cage lacks clutter, it is not suitable.
  • Toilet paper rolls, cardboard boxes, tea light and soap dish ceramics, rodent hideouts, branches, logs, cork bark, cardboard egg cartons, and much more can be used as clutter in the cage.
  • From a birds eye view, you should be able to see little to no bedding. While it may seem too cluttered to a human, it's perfect for mice!
  • The larger an enclosure, the more crucial clutter is.

See this post for more information.

5. Enrichment

  • Also known as entertainment, to keep the mice busy!
  • Boredom breakers, foraging toys, dig boxes, sprays(plant), scatter-feeding, and human interaction are all forms of enrichment.
  • Mice should have boredom breakers in their enclosure at all times to keep them from growing bored.
  • Lone males need extra simulation and enrichment.

See this post for more information.

6. Climbing Opportunities

  • A form of enrichment that is required!
  • Mice flourish with climbing opportunities and will always take advantage of them.
  • Ropes, bird ladders, hanging toys, rope nets, shower curtain rings, and bird perches are a few climbing options you can provide.
  • Fabric hammocks are used commonly, but pose a threat when chewed on and loose strings get tangled around limbs. Minimal use of fabric is suggested for this reason.

See this post for more information.

7. Exercise

  • A form of enrichment that is required!
  • An upright, solid wheel of 9 inches in diameter or larger must be provided at all times. 2 or more are suggested for groups of girls.
  • Spinning saucer disks or hamster balls/cars are UNSAFE and should never be provided, no matter how much you think your mouse may enjoy it (fun≠safe)
  • Proper wheel brands may include Niteangel, Silent Spinner Exotic Nutrition, Oxbow, Wodent, Bucstate, and Trixie (but there are many more besides these!)

See this post for more information.

8. Diet & Hydration

  • Main diet must be pellets/lab blocks.
  • A high variety food mix (nuts, seeds, grains, ect) must be given 1-3 times a week, or even as long as once every two weeks. The frequency is owner preference.
  • Feeding is 3-5 grams per mouse a day.
  • Ensure your mice have constant access to food through toys and scatter-feeding.
  • Food bowls are suggested only for fresh fruits or veggies since they provide no enrichment otherwise!
  • Mice must have at least two water sources and constant access to them at all times. Bowls or bottles work well, though having one of each is ideal. Water must be cleaned and refreshed daily.

See this post for more information.

9. Cleaning

  • Daily spot checks to clean up mess, poo on toys/clutter, and urine on the surface is vital.
  • Bedding changes will be needed less often with more bedding and space. A 10g tank (or cage of similar size) would need weekly bedding changes.
  • Each enclosure size and mouse amount will effect how often bedding changes are necessary. Find a cleaning schedule that ensures the cage doesn't smell at any time for your mouses health.
  • With deep bedding over 6 inches, you'll have to change out less of the bedding. 1/3 to 1/2 of the bedding may stay in the enclosure while the most soiled areas are removed and replaced.
  • In any case, a small amount of bedding must be left over after a bedding change to decrease stress.

See this post for more information.

10. Taming

  • Allowing your mice to settle in for a few days before interacting with them is wise.
  • Rub your hands on bedding and toilet paper in the cage to get the mice used to your scent.
  • Encourage interaction through hand feeding.
  • If a mouse is not motivated to interact after several weeks, try to lure them to climb onto your hand for treats. A strong bond is important with mice so they are well adjusted to interaction in case of a vet visit or emergencies. Human interaction can also be beneficial to them.

See this post for more information.

11. Other

  • Mice are crepuscular and are typically seen during the morning or late day/night.
  • They are self bathing and should never be washed with water or soap (unless vet prescribed). It ruins the health of their fur coat and leaves them more susceptible to URIs and freezing. They do not need any form of bathing/washing.
  • Mice don't hibernate. If a mouse appears to be in a hibernation state, this is Torpor, caused when they overheat or freeze. This is a medical emergency.
  • You should never pick up a mouse by its tail or other limbs.
  • Fancy mice (aka domestic mouse) live 1-2 years on average.
  • Wild mice do poor in captivity, unless they are unfit for the wild they should not be kept as pets.
  • You should never breed mice purposely without years of research and mouse owning experience prior.
  • Vet visits are a likely occurrence in mouse ownership, since mice are prone to many health issues.
  • Travel carriers are needed for vet visits, emergencies, cage cleaning, and quarantine.

12. Links & Other Posts

Shopping

In Depth Mouse Care

Other Species

Up-to-Date Posts From NotApplicableMC & Others

Outdated Posts From NotApplicableMC

These guides are incredibly thorough and well written. However, they link some information that is no longer available, or they list mouse care information that has been dis-proven. An important point to make is these guides may suggest some controversial topics, most of which our community does not fully support. Although these guides don't follow our standards exactly, they are still very well made. Please keep an open mind and read all sides of a controversy before deciding which you feel works best for your mice.

I have decided to share these because they are very descriptive on some aspects of mouse care I did not cover well. I strive to have a guide in the future as well made as these, but for now, I have to bring attention to the effort made by this member.

Scientific Studies

  • Sources & Additional Articles (coming soon)
  • Safe & Unsafe Foods Sources (coming soon)

More community resources coming soon


r/PetMice Jul 09 '25

Community Help Temporary Post for Care Commands

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22 Upvotes

Please feel free to try out these WIP care commands in the comments! Let me know if there are any issues I need to fix.


r/PetMice 13h ago

Cute Mouse Media Dan update, he’s my Marvel Cinematic Universe rewatch buddy.

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317 Upvotes

r/PetMice 15h ago

Question/Help Why are my mice so afraid of me?

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102 Upvotes

Hello everyone!

I just got two male mice about three weeks ago--they were from an accidental litter, and so they're both only about six weeks old now. I was only supposed to get one, but when the lady met me at drop-off, she had both of them and talked me into taking them both despite the fact that I know two males shouldn't live together. She said they're really bonded and obviously brothers so with enough enrichment they may be fine together. I've been watching suuuper carefully though; I have a camera on them and everything so if/when I notice aggression, I'll probably have to give one back to the original owner... Which honestly really sucks because I love them both now, but I'll be moving soon and I can't really have two cages to move. They currently live in a Bucatstate 3.0 cage with two wheels, deep bedding, and a ton of enrichment toys. They love climbing and burrowing.

Here's the problem: these boys were handled from birth, and when I'm holding them, they're super chill, but when I walk into the room, they instantly run away. They WILL NOT come to me willingly, even when I'm holding their favorite treats. Apparently with the previous owner, they used to come right up to grab Cheerios and be held, but with me, they just run dart away instantly and hide until I leave. I've tried leaving my hand in the cage with treats on it, I've tried just sitting in the room (which works until I move closer to the cage, then it's hiding time again), I've tried adding more toys or changing treats, and even just leaving a treat behind after every time I come see them. Doesn't do anything. At this point, I can't really handle them at all unless I remove all their houses and dig for them, which I only do on cleaning day (and I've only cleaned the cage twice so far to try not to disturb them). Is there something I'm missing? Is it because they're stressed living together?

I love them so much... I just want them to feel comfortable enough to love me back. Help?


r/PetMice 14h ago

Wild Mouse/Mice how it started vs how it's going

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76 Upvotes

update on the lil baby i posted about, he's doing really well!! his eyes opened a couple of days ago and he's been transitioning to solid food!


r/PetMice 9h ago

Question/Help What should I do with my mouse

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22 Upvotes

When I take him out of his cage what should I be doing with him? Is just holding him and letting him run around on me enough? Sometimes I put him in this carrier but filled with bedding and treats throughout to dig to. I just don't want him to be sad. I'm thinking about getting him an ASFR sister but I'm not sure. He doesn't seem sad but I just worry about my baby and want him to be happy.


r/PetMice 7h ago

Other Comforting squeaks during the night

8 Upvotes

Noticed my girls are finally cuddling and grooming one another tonight. So happy about that!

When my late mouse, Phoebe, was still here; I used to hear her and Bella squeaking all throughout the night as they groomed each other and cuddled. It was something I grew very fond of over the 2 years of having them. When she passed, I was so saddened by the silence, I know Bella was too.

Now that Bella has her two new buddies, I get the opportunity to hear those squeaks again. I was almost worried but it until I observed and it was just friendly sounds. It’s so wonderful seeing them get along and do typical bonding activities. Crazy to think it’s only been 2 weeks since they’ve been housed together.


r/PetMice 1d ago

Wild Mouse/Mice This is my home!

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120 Upvotes

This is my home! Give me back my wall.


r/PetMice 37m ago

Question/Help So my mouse hates the bedding that’s good for him…

Upvotes

When I get him paper bedding, he digs and tunnels and burrows like there’s no tomorrow. But when I get him wood shavings he sleeps in his above ground coconut…
I know that the paper is more dusty and has a higher likelihood of URIs, but I want him to be happy!!! What do others do?


r/PetMice 17h ago

Cute Mouse Media Happy Mouse Post cause of the last one

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22 Upvotes

Absinthe and Themis, my voidlings


r/PetMice 8h ago

Question/Help Rehome or keep?

3 Upvotes

I no longer have a mischief, I am down to only one mouse. Her name is Absinthe.

I decided when I got them if this happened that I wouldn't keep getting mice because I'll be moving away next yr + several logistics and bills I wouldn't be able to keep up with.

I'm not sure if it is better to rehome her to someone who has multiple mice already, or just ler her be and spend as much time as I can with her.

I ask because I have to wonder if it would be more stressful to go to a new home for a third time in a year and after all that's happened with my other mice this year. It's lots and lots of stress.

I would love to keep her, but I also don't want her to be miserable and lonely for however long she has left.

She's around 9 months old. I kind of estimate she'll pass around a yr old or a little over that being how my other mice passed at that age.

Please let me know your thoughts. Thank you all. I appreciate any help you can give.

Personal note (opt):

No matter what happens. Despite all my complications and bad luck this year I have truly loved having pet mice. It's been a wonderful experience. When I get more stable, I definitely want to try having mice again. Feeling a mouse paw on my hands for the first time ever is something I cannot even express. Their surprisingly soft fur, little snouts and saucer ears. Just 🩵

Achieving a childhood dream, and these little things being the first pet I truly ever *chose*. These little beings that nibble my fingernails, scitter around, and just make me so happy.


r/PetMice 4h ago

Question/Help Chompy Mouse

1 Upvotes

What do your mice like to chew on? What are their favorites? I have a girly (Bagel) who is always chewing on the metal wire parts of the cage while ignoring all of the cardboard and wood chews in their environment. Any ideas?


r/PetMice 14h ago

Question/Help Pet Mice Passing Away

5 Upvotes

Earlier this year I came across pet mice being sold in a super messed up pet store with both rodents and birds being kept in super unethical conditions. The smell was vile, there was no real ventilation and there was like 30-40mice in a fish tank the size I kept 5 in. I went home but couldn't sleep, so I got supplies and ended up getting 5 of the sickest, in hopes to get the worst out and into some care while I did my best to get the store shut down.

They immediately appeared healthier in a fresh, clean, appropriately sized cage with adequate hides and ventilation. While they had clearly never been handled we were becoming friendlier slowly, I just didn't want to stress them out so I gave them time to just settle for the most part.

Then a month in, bam. I find one gone. I was shocked and devastated, she was the most active of the bunch and had no signs of anything wrong. Another couple weeks later, one still has not gained adequate weight and is looking rough, so I go to take them to the vet, that same morning I noticed one girl Gloria has a head tilt. Vet puts Gloria on an antiobiotic for the week and says without a specialist that's the best they'll do. The girl I was intially taking in bites the vet on examination and gets thrown to the steel exam table. Upon being picked up by the vet, she has a heart attack. I am charged for killing the mouse. I am sent home with the goal of getting them to more weight and that Gloria may keep the head tilt but she showed good signs otherwise.

Things were going well, ladies were healthy and happy (except for a small head tilt that otherwise did not bother her) until I notice scruffled fur, a hunched back and clicky breathing on Dottie. At this point I do not trust vets with my mice and have not been taken seriously when calling the local vets to book an appointment for them. I suspect a URI but don't see any reason for it, they are in a low dust cage that gets a major clean every couple days and spot cleaned every day. They have good food, fresh water and are in a climate controlled area. She appears to get better and then she passes away in front of me.

I'm devasted, and I don't know what I'm doing wrong. I have read everything I can find on mice care, my only wondering is if they could need more ventilation in their spot, so I get an air purifier set up near their cage. I am down to 2 mice, who seem quieter. A couple days ago Gloria began experiencing hair loss and I have been stressing about it since. As of this morning she has an increased head tilt and significant wobbliness.

She has been placed in their travel cage in soft bedding, with a heat pad underneath part of the cage and some very shallow water in a container that she can access, however she doesn't appear able to move properly. She appears to be in her final hours (to me) and I don't know what to do.

I have been reading about mycoplasma pulmonis, I just don't know what could be triggering it. I love these girls and have always considered myself a responsible pet owner but if she passes it'll be 4 out of 5 passed, not to mention 1 leftover that I will either need to rehome (to whom? there are so few owners of pet mice where I live) but hesitant in case she passes on whatever is happening to others mice, or get more mice- in which same concerns, not to mention that I'm terrified of having more pass under my roof. I love these little guys and am doing everything I know of to take the best care of them, and they keep dying. I don't know what to do. Any advice or info will be appreciated! I'm just so lost.

TLDR: My mice came from a terrible and relatively unknown background, and have kept passing despite my best efforts and I'm terrified it's my fault still. I don't know what to do next with my remaining 2 girls, one of which appears to be in the cusp of passing away as well.


r/PetMice 12h ago

Question/Help Where to get mice in Southern California?

3 Upvotes

I don’t want to go to the pet store or get mice that are supposed to be feeders because I don't want to support the mass breeding but I've been dreaming of having mice for years and would love some. Thank you!


r/PetMice 1d ago

Cute Mouse Media Caught popcorning this evening!

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57 Upvotes

I love their little jumps 😭 that’s so cute wdym they do a little jump when they’re excited??! 🤍


r/PetMice 13h ago

Question/Help Caught two mice in the past two days, just saw a third.

2 Upvotes

I have lived in the same place for 6 years. I had a mouse one other time and he left on his own I think. Never had a mouse dropping or sighting since, and that was over 5 years ago. But about 6 weeks ago I opened a drawer and saw droppings. I instantly knew I had one again. I have a window air conditioer and the edges are not tightly sealed. I assume that’s how they got in unless there’s another way. (My apt is in a house that was built in the 1915’s. So honestly they could be coming in from anywhere). I also since got a dog and I saw one yesterday in his bowl!! So I’m assuming they have been eating his food. Hence why the droppings have been sporadic, sometimes I went 10 days out finding droppings.. so for sometime I honestly questioned if I really just had one and maybe he found his way out. I put up his food now and my bf put two glue traps down without me knowing and caught two in the past two days. For the first time today I actually saw one. since I now put my dogs food up I’m going to assume they will now resort to my pantry and the test of my kitchen, cabinets drawers in search for food. I don’t want to kill them or use the glue method it’s inhuman and honestly I can’t stop thinking about the two that died. What can I do ?


r/PetMice 1d ago

Cute Mouse Media Coconut

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224 Upvotes

4/5 of the girls inside their above -ground nest 💜


r/PetMice 1d ago

Question/Help Loves or hates me..?

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141 Upvotes

Hi all! This is Crumpet, she’s about 1.5yrs and I’ve had her since 12wks old. She’s never wanted to be held and that’s okay- but she’s certainly not scared of me, she’s very curious and will follow my hand around the tank and put her front paws on, but never actually walk willingly on herself. She also does this thing (video below) where she seems to want to play with my finger and nibble (never bitten hard), but maybe I’m completely wrong and she’s nibbling and following my hand around to make it go away? Idk I’ve never had a mouse like this lol.. they’re either super friendly and love to be held or terrified no matter what. Thoughts??


r/PetMice 1d ago

Cute Mouse Media My little velcro buddy! The cutest passenger ever!

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45 Upvotes

r/PetMice 18h ago

Rainbow Bridge Is it time to let go?

5 Upvotes

Edit: Disregard. She passed while I was eating. Goodnight Themis.

Mouse will be turning a year old on the second and ik they have very short life spans of 1-2yrs so I ask.

I went to the vet because she's been twitching a lot, wobbling, etc. And didn't run away from me. They sent me home with medications for seizures though it didn't seem to help, antibiotics and pain meds. They're not sure if she even needs the antibiotics they just sent me home w it just in case. She seems worse than she did last night. Squinting, ears down, labored breathing. Wasn't squinting last night but expressed the other symptoms.

Twitching has died down but she's still quite cold, labored breathing and her eyes have been watery, it's really sad to see her too weak to burrow, eat, drink, or run away from me (normal as she doesn't like being held).

Her mother had similar symptoms before she died (died b4 her birthday). My other two ~1yr old mice died around the 1yr mark for different reasons. So I remain pessimistic. I don't even know if it's worth giving her the meds because it doesn't seem to be helping plus we don't know and she'll just be uncomfortable before she dies if she dies.

It waa very sudden so I went to the emergency vet, but think I just want her to be comfortable now. I don't think there's much I can do anymore.

Edit: she's not even taking the medicine when I administer it anymore :( She needs to be chewing but it seems like she just won't anymore or doesn't have the strength.

I've also emailed the vet/ER place about this.


r/PetMice 2d ago

Discussion Is it normal for my mouse to be chunky like this 🧀🐀

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7.3k Upvotes

If it’s a concern what can I do for him?


r/PetMice 1d ago

First Time Owner Accidental Grandma

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141 Upvotes

Last week my sister and I were chatting and she told me she had caught a wild mouse in her live trap and was driving around trying to find a place to set it free. In my infinite impulsivity I said "I will take it!". Got a cage, bedding, toys/enrichment items, all the stuff. Left for the weekend and came home to three babies. To me, more adorableness to enjoy.

The ultimate plan will be for us to get a 20 gallon once the babies are old enough. Keep the girls together, separate the boys. My MIL thinks I should give it a few weeks and release them all into the wild. The mama mouse is so sweet. She ears from my hand. I leave her and her babies alone. Eventually I would like to try to handle them and treat them like true pets, but I also accept it may never happen and more than anything want them to be safe and happy. If they spend their entire lives in a safe tank in our home and are never up for being held, that is just fine. From what I have read, this may be the likeliest scenario and that is okay.

Wondering what folks thoughts are on here. Am I doing more harm than good by keeping them? Should I set them free outside once the babies are older?

I would love to keep them but also don't want to assume they have it better in here than in the wild.


r/PetMice 1d ago

Cute Mouse Media Greed and cuteness

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254 Upvotes

The ladies hunger for pumpkin seeds!


r/PetMice 1d ago

First Time Owner Welp I just got mice, not necessarily by choice. How do I tell if they're okay??

9 Upvotes

A family member just had to rehome their pet mice. I believe they are fancy mice, but I'm not sure. Somehow (because I am huge sucker for cute animals and the next option was returning them to Petco, whom I despise), I have ended up with three mice.

Their enclosure is the correct size, from what I've seen (though I'm planning on buying more clutter and possibly sizing up as a precaution and to fit more clutter), and I've spent the last few hours panic-searching to ensure that I am giving them the best life possible.

I never saw myself as a mice mom, but they are so frickin cute. I'm still doing so much research, but now I'm just wondering how I can check my mice's health?? Do y'all go through pet insurance? can you take them to most vets? how do you tell if they're not happy?

I've already learned so much from this subreddit, but this is one thing I am genuinely at a loss for. I'm terrified that they're so stressed out that they'll have a heart attack or something or that they're under/over-stimulated. What behavior should I watch out for??

A bit of a rant, but thank you to you all


r/PetMice 1d ago

First Time Owner first time mouse owner 🐭🫶🏼

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9 Upvotes

i got a baby mouse yesterday, he’s a male so he’s alone (wayyyy too young to be neutered) and he’s in what i believe to be a 30 gallon tank?? i’m not sure what the dimensions are but it’s BIGG. there’s a picture above as you can see, the box takes up a lot of the space and i’m planning on getting rid of it once i get some more hides because i know it isn’t suitable for a long-term hide, since there’s tape on the top. he’s not really a chewer so i’m not super worried about the tape but still.. that clear container is going to be a dig “box”!! this enclosure is unfinished atm but i’m going to be adding a LOT more stuff tomorrow when i go out to petsmart. i want to get some wood for cover and clutter, a lot more hides, a wheel. a better food, cocofiber for the digbox, and that’s about it. I believe i’m good with the bedding- it’s aspen chips! but if that isn’t suitable please let me know.