This is our first ever season with chickens and we acquired 8 hens, 1 rooster on Jan 25. Just last night, the 1.5 year old rooster died. I found him this morning - possibly being mourned by a girlfriend. I admit, when checking for eggs this week, walking into the hen house/roost i would notice that he would stay inside, kinda slumped in (if that makes sense, head tucked into his neck, tail down). he and one other hen would be inside, while the others were outside. i just thought he was cold, wanted to stay in. Has anyone else experienced this? any ideas why he keeled over?