One of my chicks makes a sound out of pain when poops. The poops look completely normal. They aren’t watery. The place where I got them from had a lot of them with clumps of poop stuck to they’re butt. They weren’t taking care of that. I’m wondering if it’s just raw? It looks like there is a scab and maybe that is hurting? I don’t know if there is anything I can put on to help it heal and hurt less. Maybe a little Vaseline? But I don’t want them eating anything harmful to them. Any suggestions or knowledge would be greatly appreciated! 
oh she is about 2 week old. On a chick starter feed since I got them which was only 3 days ago

oh she is about 2 week old. On a chick starter feed since I got them which was only 3 days ago