it could be a teething stage as well. they start to loose baby teeth and get new adult teeth. Sadie bites me all the time but she's a puppy at 9 weeks and shes' not doing it on purpose. i say "NO BITE" sometimes i yelp and ignore her, and sometimes i just get done what i have to do and then stop messing with her...
i'm in the same boat as you are with trying to harness or train her and anything hands on she's biting at me. she's not rough with me though and i don't think she's meaning to, she's just chewy and teething. i'm working on her nipping though |