Originally Posted by Steve Strom
Does he show you any prey drive? Chase a ball or anything? Movement gets his attention, other then the kids? Have you taught him anything like a leave it command?
I'm really glad that you brought that up. His favourite toy is a bouncy ball. I have a poodle that we allow on the furniture so that she can have a private space, and he'll wait for her to jump up onto a couch and he'll lunge for her when she does. It happens nearly every time, multiple times per day. I always suspected that it was the sudden movement that made him lunge for her. He's never hurt her, but it's annoying to say the least.
"Leave it" was one of the first commands we taught him because he would bother the poodle and chew on furniture.
Oddly enough people on bikes and cars don't phase him in the slightest.