Cute dog

Yeah they learn quickly, but when they get older they are a bit stubborn. Mine, Gizmo, is completely obsessed with anything round like balls, all sizes, as long as they even resemble being round in any way. He can spend entire days trying to get everyone to play ball with him, and even after playing with him for long periods, he still continues to the point where it gets annoying. Telling him to stop it only makes him go find someone else.

Also he barks and growls at all strangers that come to our door. Even punishing him doesn't work. But that's pretty much our own fault for not teaching him that it was wrong when he was a puppy. I looks pretty funny when a small puppy is trying to act as a guard dog.