So I am panicking!!!!! My girls are dropping like flies, and my vet is out of town... About a week ago, I noticed that my one hen, Chocolate Chip Cookie Dough, was not quite herself, but she had a lice infestation and itwas super hot, so I thought it was just stress.... Up until Sunday, I knew for sure she was eating, and I saw her drinking yesterday morning and came home to find her dead under the nest boxes. It hasn't been that hot and I could see no obvious signs of distress. Yesterday, my other black sex link, Tyra, seemed "off" not as active, not as bright. Checked her crop last night, it was full, Checked it this morning first thing, is was empty so eating is not a problem. Saw her drinking last night. All of the girls are free range during the day, have layer pellets and grit. Two days ago, I started them on Tylan due to my other chickens having a resp issue, but I can't imagine what, though the Tylan started helping right away... No sneezing, discharge or other signs. Tyra did start wheezing this am, and was breathing hard last pm...this morning she is in the nest box and won't come out. Her comb is a normal color...still no discharge from her nose, eyes look bright....what the hell???????? I called my vet and he is out of town..... Have to go to work at 11, so I am pressed for time....Ideas???