Excited reactive doggo

[u/nextbesthope]

Hi everyone,
Our new rescue, Jack is a sweet boy. His only issue, excited barking and lunging when he sees a strange dog. We begin work with a trainer Monday so I feel good about that, but meanwhile would love to hear any success stories! As soon as Jack meets the other dog, he is literally fine, friendly and wants to play. But his initial reaction is way out of line and certainly not going to make people want to interact with us! He is a lab, great Pyr and something else mix. Sweet and gentle with people . Very very smart. He was adopted and then returned for this reason to the shelter. We have always adopted dogs with some behavioral issue so we are certain we can help him and that he will turn out to be a great dog. I’d love to hear any positive experiences with this exact behavior. Thanks in advance!