I have lost two chickens in the past month, both were perfectly healthy, they recently got over a respiratory infection I treated with Tylon 50, but other than that I hadn't had a problem with either. The coop is right outside of a high school classroom and although we live in a some what rural area we don't see a lot of wildlife around the school other than foxes and there is no way for them into the coop, and from what I have read they would take the body. One was a Easter Egger hen and the second was a Wyandotte cross rooster. Both were found laying flat with there heads tucked back under themselves at a very awkward angle. Neither were really bloody or had huge laceration wounds. I am worried that I either have a different health issue going on that I don't know about, all the chickens come into the coop last October from several different farms and although they all seemed healthy I have never lost this many before (in total I have lost 4 in the 5 months, two were older and had troubles coming back from the respiratory issues) or that I have a predator getting into my coop. From what I have read there are some animals that kill for fun, or drain the animal of blood, I'm just lost for ideas at this point. Any help would be greatly appreciated.