We have 15 chickens right now. We have never had any problems with disease until this past Summer. I bought a dozen chicks from a local breeder in May. Within two days two of the chicks had died from cocci. She replaced them and we treated all the chicks and fora little while they seemed ok. But, the chicks grew really slow and just never seemed to really thrive. They have just been dying off one at a time. THey would be ok (small and sickly) but one day it was like they couldn't stand up or could only stand on one leg. We would do all we could but they would eventually just die. Today we lost our last one. He seemed the healthiest out of all of that batch. But, last night I noticed he didn't get on the roost. This morning...he just stood outside the hen house wobbling around. We did all we could but he died a few hours ago. The rest of our chickens...all at least 10 months old...seem fine. My question is...is it possible that they contracted it from that breeder? Or would they have shown signs sooner? They were all so sickly. Could it be something to do with the breeder? I had gotten other chicks just a couple months before them and they were all fine and are healthy now. I feel horrible and I'm wondering if this is somehow our fault and if we need to do something different. Thanks for any help!