I'm so, so sorry.Oh where I do begin.....
My healthy chicks are dead....
My babies have almost all died
Went from happy peepers to dropping dead in less than 3 hours. I got home just in time to watch the second one die on my hand....
I am a wreck. I am so upset that I don't even want to keep chickens anymore. I lost half my volume of birds this summer alone.
I am tossing everything I had in with them and buying new stuff for the last one left.
Like a godsend I just had another local breeder contact me to give me some of his eggs.

Is it possible they were poisoned somehow? Maybe a family member replaced the brooding light using a teflon coated bulb while you were away? There was a long thread earlier this year about someone who lost 12 hens in one afternoon after mistakenly replacing their heating lamp bulb with a teflon coated one.