Ok, so I have a flock of Buffs with 2 (well 1 now) roosters. They are about 15 weeks old. They're happy, well-fed, and seem healthy, even this one I'm telling you about. The wife went out to feed them today, and all were fine, when she turned around one of the roosters was laying on the ground deader than a doornail. I went out, no wounds, no indication of blood anywhere (I checked well), no foam at the mouth that may have indicated choking (no jokes please.lol). Any idea what I'm looking at here? Not really into performing autopsies, but would like to know what would make a chicken drop dead instantly.