Sorry this is so long, but I wanted to describe the situation fully and try to address potential questions. I lost a pullet this morning (or last night), the first I've lost since I put up my electric fence netting. And it appears she may have been killed by another chicken. Here's the set up. I have 9 chickens. One rooster, about 8 or 9 months old, has four hens, two are under a year old and two are elderly. I have a small coop under the deck for those chickens. The basement door lets out into that area which is paved with paving tiles. Then the fence allows them access to the front and side yards. I have 200 feet of fencing plus the sides of the house as the edges of their world. The point is they have quite a bit of space. Then I got four Easter Egger chicks in late August, so they're about 3 1/2 months old now. They spend most of their time in the basement, but occasionally I'll kick them out into the yard with the others. The EEs are two pullets and two roosters. One of the roosters, Martin, was being pretty aggressive with the hens, especially the gray one, which is the one I found dead this morning. I kicked Martin out of the basement about a month ago, because of his behavior. He's lived outside with the others since then. He seemed to calm down a lot. He keeps his distance from the others mostly, but recently I noticed he's been sleeping closer to them. The outdoor and indoor chickens have been around each other quite a bit. Sometimes the outdoor chickens come into the basement for a while. And the EEs go out into the yard sometimes. So they all know one another. So yesterday I put the indoor EEs outside, and I left them out all night. When I went down this morning, Quirk, the other EE rooster, was outside the fenced area, and the gray EE pullet was dead in the paved area. She had dried blood on her head, and her chest was torn open. The other chickens had obviously been eating her body. So, what happened? I think Martin viewed the EE hens as his. Did my throwing him out and leaving them with Quirk cause this problem? (I should add that Quirk is a particularly ineffective rooster. He's timid and had a crooked leg. Left to himself, there's no way he could have dominated Martin and got the hens.) Could one of the other hens have done this? I have a particularly bad-tempered RIR who's at the bottom of the pecking order outside, so she delights in bullying the EEs when she gets the chance. Two other facts: First, I'm watching my sister's young cat for a few weeks. He's fascinated by the chickens. I thought he might have been the killer, but really he's not much bigger than the dead pullet. And he's been locked in the basement with them for long periods of time without injuring them. Second, there's another rooster hanging around here, which may be stressing my chickens. Last weekend I came home to find my rooster standing on top of another rooster which had somehow got into the fenced area of my yard. The strange rooster was quite bloody and was attempting to get back out of the yard through one of the holes in the fence - impossible. I assumed it was my neighbor's rooster, so I just tossed it out of the yard, thinking it would go home. Instead it's hung around my house. I'm wondering if someone dumped it here. At any rate, its presence doesn't seem to be welcomed by my chickens. Any thoughts? I really don't want to lose the other EE pullet, but she's going to have to be integrated into the flock sometime.