For me it was pretty random. I don’t know if it’s a rooster thing, but I’ve heard of people also loosing hens. My only assumption is that our father rooster passed on to his son. I don’t think it really has anything to do with diet, as the chickens likely aren’t eating poisons (they’re pretty...
In that case your poor rooster probably had heart failure, indicated by how blood could not pickup oxygen without the pumping of the heart and therefore went the standard purple-blue color.
I have never dealt with East Asian or Bantam varieties of chickens, so take my words with a grain of salt. I have had two roosters (a father and son) pass away from what I am fairly sure were heart attacks. From what I can tell, heart attacks can happen suddenly and without a real reason. By any...