So far I have had two Cochins die from I think the same condition. They were about 11- 13 weeks old and died with a week between the deaths. I noticed on the second chicken (13 weeks, who just now passed) yesterday that her butt was swollen (somewhat like when a chickens crop is full and squishy when you touch it). For about a week she wouldn't move very much and would usually just sit in a corner of the coop or pen. When I would pick her up she would start gasping for air. When I would try to catch her, she would run, but only then. She died in my arms. Right before she stopped breathing, she had what looked like a seizure. At first she wouldn't stop rolling and thrashing on the floor but when I picked her up (this is what the other chicken did too) she flapped her wings violently and then she passed.I think she was egg-bound. Is there anything else that could have happened? This is my first time raising chickens so is there anything I should watch out for in the other birds? If I do feel that the chicken is egg-bound, what should I do? Thank you very much in advance.