I got 4 chicks about 3 weeks ago. I'm new to this. The smaller americauna died first. I had found her struggling on her back and then within 24 hours she was dead. Then the larger Americuana died. Same pattern. The two small blacks are alive but listless and not eating or drinking or pooping much. Not chirping. Laying down. Last night I noticed that their vents were all clogged and I unclogged them using some warm water. I figure they've got some disease. Are they goners? What should I do?