One year ago I hatched 9 bantams from eggs off ebay. 2 rooster and 7 hens. Hatch date 12-4-17. Over the last 2 week's I've lost all but one rooster whose health suddenly declined over night. No lice, no mites, poop is fine and until yesterday he was eating and drinking fine...the same for the other 8 birds. Hens not egg bound. Fed layer crumble and fresh water available 24/7. Could this be a genetic thing? Inbreeding? DH and I have had chickens for years and this is totally new to us.