I lost 8 out of 14 of my day old chicks. They were all healthy and active until they suddenly 1by 1 started chirping loudly and then starting flopping around until they died minutes later. It was horrific to watch. I have been trying to figure out what possibly could have caused such a sudden mass death of my healthy chicks. I came acrossed info about Teflon coating releasing fumes which are toxic. According to the Westinghouse house site their bulbs have a non- stick coating. The bulb I was using had been plugged in for about 48 hours before the deaths occurred. These bulbs are sold as Brooder bulbs at Tractor Supply.