I lost one hen Monday and 4 more yesndterday and I have no idea whats going on. Peaches was a 3 year old hen that we loved dearly. We found her monday in her nest box struggling to breathe. Her comb turned purple and she had diarrhea on her bottom. I thought it might be gape worm and gave her ivermectin. She died in a couple hours. Sunday she was a happy healthy girl and the next she was dead. The rest of the flock seemed healthy so I didnt do a whole flock worming. Yesterday we lost 4 birds. Only 1 has been found. He was in the woods and looked like he was confused and seeking a quite place to die. The others must had died in a similar manner but were found before us. I just dont know what to do with the rest of the flock. Everyone is acting normal but I'm afraid they are being poisoned or have some disease. Please help!