Winter likes to nip at the rest of my family usually in the rear end when they are walking down the hall, other then that the only time she tries to nip is when we're practicing for agility but with her it's part of her nature...she is a border collie after all so I'm trying to get her to understand that it's better if she stays quite and not nip while and we're running together, of course at the moment that's on hold because of the no running instructions from the vet.