I have some Seramas that are from 1 day old-3 1/2 weeks old. So far, one of the older ones has died. He and some of the others were having normal sized and shaped droppings with red parts for several days. I have a lot of experience with coccidiosis, and I don't think that is what this is. There are no other symptoms and they are young. What could it be? They have been getting medicated chick starter.