No, but he does love to play with the other dogs, and he tries to herd the cats, but they don't appreciate it very much. :-)
Are you others Australian Shepherds as well?
No. Charlie we got as a puppy, but the other two were rescued dogs.
The oldest is a White German Sheppard we got when he was 5 (now 12) from an abusive family, and the other one is a Collie-Doberman mix we picked up at the pound when she was one. She's now 11.
Sounds like you have your hands full! I've never heard of a white German Shepherd. I love them though, such pretty dogs. Which breed is dominant in your doberman/collie mix?