I have now lost my 2nd chicken for some unknown reason. Both chickens seemed perfectly healthy the day before and the day of their death--eating, drinking (as far as I could tell), running around my property, scratching, etc. The only thing strange was they both stopped laying eggs for 2-3 days right before they died. Now my 3rd chicken didn't lay an egg today and I'm very worried. I found both hens (a week apart) dead in the coop with their eyes shut. They both showed no signs of illness or injury. There are only 2 things I can think of--they died from heat (I'm in AZ and temps are getting up to 115). Their coop has shade but not a lot of access to the wind/breeze where I have it. I do free range my chickens but both died either on a day where I let the chickens out later than usual, or kept them in for most of the day. The other item is that both chickens were scratching around in my cat's litter box on my patio which has compressed pine pellets in it--that swell and break apart when they get wet. Perhaps they ate some? I've put a fan blowing on the coop now to help with the heat and I'm making sure to turn the chickens out before it gets too hot. Should I get a play pool for them to cool off in? The rooster stands in a bowl of water I leave out for them to drink out of, and they spend most of their day in the horse stalls under the auto waterers where the ground is damp. How can I tell if I have a disease or something that is killing my chickens? Any ideas or suggestions? I keep their coop dusted with DE and they don't have any mites or anything I can see. Both of the dead chickens did have bare spots on their backs from the Rooster--could this have killed them? Thank you!