I hatched 7 peeps in the beginning of July. All seemed well until a few weeks ago. The first one came down with splayed leg at about 4 weeks, then #2 did the same thing about a week later. Brought them both inside and treated them and both got better, up and walking in less than a week. #3 came in because she was waddling like a duck. #1 and #2 started to regress and were having issues walking again. Again#1 got better #2 ended up dying. #2 was continually on her back, unable to flip herself back over. #3 is still in the same condition with the waddling. Now today I go to the coop and find yet another chick down. She was just sitting on the floor, still responsive, yet very lethargic. I put her in the infirmary, and tried to get her to eat and drink with no luck. She just kinda sat with her eyes open. I put my fingers in front of her eyes to see if I would get any reaction, but I didn't. She didn't even blink. I watched all the healthy chicks running around yesterday evening, now today one is down for the count. If anyone knows what might be going on, any help would be greatly appreciated.