Join Date: Apr 2014
Location: Ontario, Canada
I adopted a male GSD that on first exposure, was not cat friendly. When I first introduced him to my cat, I made a very bad mistake. I forgot the vet had taken his collar off because he had an abrasion on his neck. When he saw the cat, and went after it, I had no way to hold him back, and he actually grabbed the cat in his mouth twice, despite me yelling at him. I am fairly sure that if I hadn't been there, the cat might have been killed.
Eventually, he chased the cat into the living room where it got out of his reach by climbing the Venetian blinds. I at last managed to grab him and secure him in his crate. The cat eventually emerged, unharmed, from behind the books on the top shelf of my study.
After that, things were much more controlled. The dog spent a lot of time in my study, where his bed and crate were, and when the cat came into the room, I was very firm with him: "LEAVE IT!" I'd tell him. And if he didn't obey, I'd get up and give him a physical correction.
Before very long, he and the cat were the best of friends, and were playing together. When the cat slipped out the door one dark, foggy night, and got run over by a car, he became quite depressed, and obviously missed his friend.
I know this is a different situation from yours, but if I were you, I would get a prong collar, and use it to correct him. If he gets away from you, I think it's quite possible he could kill either the cat or the rabbit. Since you don't have a cat in your home, this is really the only way you are going to get control of this situation.