I have two semi-feral cats that decided to adopt the family when we moved into our new house. They're both hunters, although they're spending more and more time inside lately and getting plenty of food.
Both of them have taken an interest in my chickens, but I haven't let them near the birds. They're not quite full-grown yet, otherwise I think at least one of the cats would be scared of them! (She came running inside with her tail all puffed up when some wild turkeys wandered through the yard once.) I threw a rock at the other one when he tried to get under the porch where the chickens were and he hasn't gone near them since.