Yesterday when we got home from work I noticed a rooster on a black hen that didn't get up after he was "done" with her. I went to investigate. She didn't get up because she was dead. She didn't appear to have any external injuries - no blood, all limbs and head intact, but she was laying on her side and was flattened. If that sounds strange, it's because it was. She was the smallest Silkie pullet we have. Could the roosters have injured her and ultimately killed her by trying to mate with her? The only roosters we have that are chasing the pullets are the Silkie roosters so they aren't really large, but are still a good bit larger than the little dead pullet. Any ideas on what might have happened to her? Thanks.