I have several chicks a bit over 5 weeks old. I have a sneaking suspicion they have coccidia as they act healthy but there are drops of "blood" all over their brooder. I checked them all for injury and it appears to be fecal. They have NOT been on medicated food as I just used starter feed this time instead of medicated. Day before yesterday was the first day they were ever on the ground and it seems to be more blood yesterday and today than ever. What should I give them? They have been in a pen around my adult chickens so should I treat them as well? They have also been around my older chicks (now about 5 months) who were on medicated food until they were 8 weeks old so should I treat them, too? Thanks!