Coccidia out there are repressented by many forms. Each is particular to the types if host it lives in. My understanding is those infecting mammals will not infect birds.
Are your affected chicks kept in a brooder? Brooders have a lot in common with concentration camps when not properly run.
Based on pictures you posted before you have had at least some birds confined. Did you use waterers / feeders there then use them in brooder area?
Are your affected chicks kept in a brooder? Brooders have a lot in common with concentration camps when not properly run.
Based on pictures you posted before you have had at least some birds confined. Did you use waterers / feeders there then use them in brooder area?