My chickens all seem very healthy and happy but i have noticed blood in some fecies. it's like small little balls of blood. like the size of a tiny ball of styrofoam. they have actually been eating a lot of styrofoam because i have been working with it for the past month or two and its all over the place here. I have been feeding them medicated chick starter and medicated chick grower since they were born. they are about four months old now and i have noticed it for the past month or so. they are in the same coop with 11 bigger chickens that are about two years old ,and those chickens are fine, i never find any blood in their stool at all. 10 laying hens and 1 rooster. I have found lots of stuff about coccidiosis. but don't want to jump the gun and go steralizing my newly built coop and what not. is it okay to eat chickens that have coccidiosis? How to i find out for sure if it is this? any advice please!