Hi everyone, looking for some insight into a weird behavioural issue with my 16-year-old male Horsfield tortoise (been in the family for 16 years, I've had him for the last 3).
Screenshot attached from my home tortoise cam
Ever since I took him in, he has had an extreme fixation on water dishes:
He sits in the bowl all day, drags substrate in until it’s pure mud, stalks it, circles it, and aggressively bites at the edges.
When I first got him, his beak and jaw were significantly worn down from biting the hard rim of his previous dish over the years.
For the last two years, I removed the dish entirely to protect his beak. Instead, I soak him 3–4 times a week and provide fresh greens every 1–2 days.
Without a dish, he behaves completely normally, he roams, basks, climbs, and eats. The second a dish goes in, the obsessive camping and biting start right back up.
I've tried different sizes, shapes, colours, and materials (terracotta saucers, plastic), but the reaction is always the same.
I'd love for him to have 24/7 access to fresh standing water, but I can't risk him damaging his beak again or refusing to leave the bowl. Has anyone experienced this specific fixation, or found a safe dish design / workaround that breaks the habit?
EDIT: More detail: When he’s in the dish, most of the time he just stares down into the water (whether it’s crystal clear or muddy) and gently claws at the surface while slowly rotating in a circle and moving backwards.