I have lost several chicks due to them suddenly like gasping for air for a short time and they just die. They are fine one minuet then they start gasping then they die. I did not see anything stuck in their throats. I have lost 4 in the last few weeks this way. I don't know if it could be some kind of disease or what? I put some corid in their water to be on the safe side. If anyone knows anything thing that would help them, I welcome the advice.