I went to put my chickens up just a little bit ago and found one of my hens dead on her side in the run. There were quite a few down feathers around her and she had blood coming out of her mouth. She has always been a very docile bird so I dont think she was fighting and I really dont think it was a predator (there's snow down and the only tracks are chicken) this is the only issue I have noticed with my flock. My immediate thought is that she found rat poison but I dont know where she could have gotten it from. Do you guys have any thoughts?