I have a concern. I recently got 6 silkie chicks from a breeder, a woman Id gotten healthy birds from before. One of them kept flipping over, and eventually died. Then the other one did the same thing. And a third one died, mysteriously a few days later. How am I to be sure there is not disease here? The little ones were treated for cocci, and act completely normal. No lethargy or anything. Im worried about introducing them to my flock later on to find out there is disease. The third one that died had pasty butt that I didnt realize, is it comomon to lose this many young chicks? I appreciate any feedback.