I have 5 outdoor cats, two of which are 5 month old kittens. I was most worried about the kittens coming of age but so far no problems. I think it matters how you raise the animals and how you act when they are all together. We are new to chickens this year. I also have two black labs, three pygmy goats (the chickens nap with them) and two baby mini donkeys and no one has had any issues with anyone else. Good luck, whatever your decision!