Lost another SF chick today. Showed no symptoms or signs of illness at all up until a couple of hours ago. Gave vitamins and electrolytes in their water , cleaned coop out completely last night , perfectly healthy seeming chick and now its dead. Fatboy is still going strong although still has red eye and pecking his feathers on his left wing only as they grow out. But he seems to be thriving aside from that. Oddly enough the mille fleur bantams that are housed with the salmons are doing fine. No illness , haven't lost a single one 6/6 are perfect. 3/6 SF are gone now. I'm completely befuddled yall. I'll admit I have no clue about chickens but I would think they would all be affected equally or at least somewhat. What the heck??