Hello, I seem to be having a growing problem with my flock of 35 hens. They range in age from 8 months to 6 years old, but this seems to be affecting only the younger birds at this point. 4 days ago, I notice a hen who was puffed up, comb pale and occasionally shaking her head. No discharge from her nostrils. She had lost a lot of weight. I brought her inside, treated with antibiotics and a molasses based poultry drench. I thought she might have an infected crop or impacted crop, but who knows. She died yesterday. Tonight I noticed 2 other hens with the pale combs (which I know they did NOT have last week) and exhibiting the same head shake motion, maybe every minute or so. They are both still eating and acting relatively normal. Any ideas? I plan to bring them inside to get them warm and treat with antibiotics but am I over reacting? Or doing the wrong thing. Thanks for any comments/help.