Five dogs in our family and three cats. Dogs have been involved in pack activity that has led to attacks on cats and even a death. Philli, the cat in this pic was attacked by Sasha, the dog here. A concerted effort to teach them to peacefully co-exist is an ongoing effort in our home. With Sasha in particular this has been hugely successful. She has taken on the role of official cat protector. She is the dominant dog and if any other dog vaguely growls at the cats Sasha let's them know that this behaviour is unacceptable.