I have 4 cochin chicks. One I noticed a couple days back was actually pooping blood, along with his poop.I didn't think too much about. One,I was unsure whether it was really blood or not. But since I'm about 95% sure it is, I am giving them chick probiotics. They eat all flock chicken feed, and do have quite a bit of scratch in their diet,and when I'm here on the weekends or breaks, they usually get to go outside. anybody know what could be wrong.