I find that I have to walk my male sheltie by himself he doesn't like any other dog coming after the girls or me so he gets very upset if a dog is growling at the fence or is loose and comes after us. If he's alone with me he will not bother the other dog if I say leave it. So now I usually 4 out of 5 times walk all the dogs separately until the younger girls are finished training. The dogs really like the one on one time together also so it's a win win situation...Jill