Since he's been in three different homes and is approaching two years old this pattern may be pretty well set. You might want to try putting stick deodorant on your hands when he gets the notion to nip. If you have ever had this in your mouth it's like biting a green persimmon. It will give him an unpleasant association by teaching him that you don't taste good. I have used it on the end of my nose to train puppies not to lick. It typically works for me after just one or two times.
He may have had someone encourage this behavior as a puppy in one of his previous homes, don't give up on him you can change behavior unless he's overly aggressive. Chances are he will lose some of the puppy play attitude on his own in the next few months. Good luck! |