I have two hens, about 10 weeks old, one Buff, one Columbian, both are listless, hunched over, and all fluffed up. I just put them in a brand new coop, along with the rest of the group (total of 10 chickens), everyone else seems fine so far. The first 24 hours the food and water supply was not set "up" so it got really dirty, but they had food and water. Today I went out to hang everything and they were sleeping in the corner. The rest are very active and went crazy on the fresh clean feed and water. I had them on grit, just to aid digestion, and today added oyster shell, which they all tried. I add Applecider Vinegar to the water regularly, no meds. I did not notice anything unusual in the droppings, no weird smells, no discharge, eyes and nose are clear. What is wrong? I hate to see my girls not feeling well Please, I would so appreciate ANY advice!!