I really shouldnt say this as it will be probably tempting fate, but as you probably all know by now we live in the middle of farm land and there are loads of foxes about, they dont tend to come near the cats and the cats stay away from them, but on saying that, 10 cats against 1 fox is probably not a good mix and the oldest of my cats is Daisy Doo Doo who is only 7. The main predator that we have problems with is the Red Kite birds, they are massive (up to a 6ft wing span) and swoop down and eat rabbits, I have recently seen them swoop down on Ruby Red Drawers (she is prob no bigger than a rabbit) but she just went up on her back legs and all claws came out and the bird flew away. The Red kite are funny birds they live in the woods at the end of our lane and the other day when we were up there we looked at the tree where a few of them sit and there was a cuddly dog toy at the bottom of the tree, one of the birds has obvioulsy swooped and picked it up thinking it was dinner and it was a stuffed toy !