Can any of you recommend a gentle way to stop a puppy from playfully biting? A lot of times when I am throwing toys or playing with her..she gets so excited that she wants to bite my hand (in a playful way...but it is still creating bite marks). I tell her NO firmly or OUCH and try to walk away..but she just thinks it is a game and gets even more excited. She is a little 'booger'. Is this just something they grow out of. They sure are fearless little dogs huh?