So, I just bought my first 10 chicks today. About an hour ago, one of them started acting funny and just laying around doing nothing. I tried to figure out what was wrong with it (I thought maybe its vent was backed up) and a few minutes after I checked it out, it started making jolting/seizing movements, rolled over onto its back, and died. Is this a common occurance? Should I be worried about my other chicks?