Thank you for reading this post, and any suggestions/info ate greatly appreciated. In a 4x4 foot small trailer I have 5 two week old layer pullets, and 30 one week old meat birds. They have all been doing well, but the meaties had pretty grungy bottoms, no real pasty butt, but several required cleaning up. My daughter asked if she could add a few to this group until time to enter the bigger flock. She came last night with three day old pullets. They were in the main group for about 20 minutes, but the little silkie was just too small and she was getting picked on. So I segregated the new birds in a box within the trailer. They all seem fine this morning. However I found one of the little meaties this morning buried under the shavings, fully stretched out, dead. There was another stretched out on top of the shavings, still alive, but when I touched it she started flapping her wings like crazy, but her back legs stayed out behind her. I put her in a box in another corner thinking she was actively dying. There are several others that are starting to stretch out on the shavings. When nudged lightly they are able to get up. The only other change was that I changed all the shavings in the trailer just before the new chicks were delivered. I took away the dry chick starter last night, as the meaties had bulging bellies, then started them on fermented chick starter this am. Any ideas?