I had a flock of 12 eight week old chicks - 10 of them I bought from Mypetchicken.com and 2 of them were locally bought from a private party. All have been healthy. All are sleeping in their coop and going out in their run during the day. Nothing out of the ordinary. One day I was not home - my hubby accidentally fed them scratch grains with hard corn kernels. This morning I found one of my chicks dead - it looks like she died in her sleep. Yesterday I noticed this chick was a little lethargic and she was sleeping more and had smaller poops. None of the other chicks show anything like this. Could the scratch grains have killed her? The run does have a lot of sand in it.