I've hatched a lot of chicks and keets this year, and in nearly every batch I've lost one or two chicks/keets to this. Their legs and feet get all dry and shriveled up looking, they become dozy, and then die within a few days. I've never had one survive this. I thought it was maybe them not finding the water (even though I dip everyone's beaks)... It's affected them at 1-10 days of age. What is it???