I keep hunting them until the leaves come on or the snakes come out. Its a great time to work with tightening them up on the tree, put a better handle on them and to work on timbering. A dog doesn't need every squirrel shot out to it like some people think. A dog trees because of instinct. You do have to watch some because they are a chance they will get loose on the tree. Watch the dog. I take a slingshot and a sack of marbles and make the squirrel timber till I cant move him any more. That fires a young dog up. Fine looking pup you have there.