No gross pics, but I have noticed that occasionally some of my chickens' poop has what looks like reddish material in it... almost looks like tiny pieces of flesh. It's just random, here and there in both chicken pens, and I have no idea which chickens are doing it. They also leave yellow foamy looking droppings fairly often. Haven't seen any worms. None of them appear sick, all are eating well. Many of them just lost quite a few feathers, and I just assumed they were molting. I'm fairly new to chickens, so I'm unsure if this means they need to be treated with Corid for coccidia, or if they need to be wormed? They range from 6 weeks up to 6 months in age, and I have never wormed them. I did start them all out on medicated chick starter, and I did treat one group of them with tylosin about a month ago for respiratory issues. Recommendations appreciated!