Yeah I saw your comment and was keeping it on my mind, just didn't want to switch over too early if I was being too rash. I clean at a veterinary center so I can probably grab a few samples and take them in and use the chart to look. It needs to be a sample with the blood in it, I'm assuming?If Corid is working, they should start being more active within the same day. There are many different strains of coccidia and alot of them are resistant to Corid (i said that already). Can you get a fecal test ?