I have had 2 chickens die in 2 days..maybe heat? It was high 90's and low 100's..coop is in full sun..they have plenty of food, water and they get all of our table scraps..I do not believe they were egg bound..2 in 2 days would be strange wouldn't it? We are very new at this (3-4 months) the other ones did appear to be panting and were a little bit lethargic but they were all fine this morning..we do not have any roosters..all hens mostly Rhode Island reds..had 2 barred rocks but one died..have a couple of Easter eggers..any info is greatly appreciated!