Sorry!! I hope the rest stay healthy.ugh. I have now lost 3 chicks in about 7 days. I can't think of what it was.
I'm finding that I've been losing 1 or 2 chicks from every couple batches. I'm sad because I hatched 4 out of 12 Polish. 1 has a crossed beak and the other 3 died, one after another. I just think it was bad stock. I got the eggs off of ebay. The crossed beak one sits up on the edge of it's brooder, or on top of the water or feed and sits there looking like a vulture.
I hope that you don't lose anymore!!!