I have one grey cat who still has visions of catching a hen and eating her. I watched him last night, stalking a hen and shooed him away, only to see him chase another one across the back yard, of course she was faster but it still ticked me off enough that I had to do something. Here's what I did. When I put the girls in the coop for the night, I've got 18 in a fairly snug coop, I put the cat in with them for the night. I stood there listening for a bit and the ladies were giving him hell it sounded like, they could get off the floor on perches which the cat could not reach so I wasn't concerned about them. This morning, when I opened up the coop, the cat was cowering in the corner behind some hay and as soon as he saw the door cracked, leaped with the speed of a bullet out, ran across the yard at full speed and disappeared under the barn....I still haven't seen him. somehow I think I won't have that problem again. Oh, there was no blood anywhere and not a mark on the hens but the cat's fur was ruffled up and soiled. Just call me the "cat whisperer"