I volenteer at a shelter and this past weekend, I noticed that one of the cats was grabbing it's cage mate by the neck with his mouth (both cat's are fixed). When I asked someone about it she said it was a show of dominance. Now I've heard of this in dogs, but never in cats. I was wondering if anyone else has ever heard of this & is it a common thing that I just am not farmiliar with because I only have one cat.