I came home from breakfast with family and found pieces of chicks. I am not sure what killed them, they were in the pen but it was the two smallest ones and they may have escaped the pen on their own. I did find one of the two out before but I can't see how they are getting loose. I just started putting the babies out in the pen for the night with the big girls a few days ago. Can anyone tell me what would leave intestine and i think its a heart heart from both chicks? there is only a few feathers left. most of it in the dirt part of my lawn right by my back door, and there was a heart or whatever it is on my back stair, this is where they spent most of their time but it is also the dogs hang out. I would like to think it wasn't my dog, I don't think she would have been so careful picking out pieces if it were. We live in a suburban neighborhood. I didn't see it when I brought my dog in, but I wasn't looking either. Of course it was my two favorites.