I have quite a few chicks I am raising. Just yesterday I noticed that I have 3 that have the same symptoms, and I hope someone can help. Out of all the breeds that I have the sick looking ones are all Barred Rocks, which I thought was weird. Symptoms are a pasty butt with bad smelly poop, and a really full crop. Like food is not moving through as it should. I do not us medicated feed, but have brought 100's of chicks up the way I am doing with these. I feed them rice, corn, oats, alfalfa, egg and grit. The things that I am doing differently recently are: I put sugar and baby vitamins in the water. And I stopped using pine shavings for litter and just use newspaper. The area is relatively clean, I change it every few days. Give me your wisdom.