I'd google some pics of "cecal poop chickens" so you can compare. This thread may help too...Yes this is my first time having chicks so once I saw this it kind of alarmed me. They are all running around and eating and drinking normally but I’m just going to keep my eye on them and holding the treats for a few days to see what’s going on.
https://www.backyardchickens.com/threads/what-is-cecal-poop.349386/