Mareks is pretty rare in quail, but it does happen. I am so sorry.

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Well the final results came in: Microscopic findings are compatible with lymphoproliferative disease
caused by Marek's disease virus (MDV) and/or avian leukosis.
Much more serious than coccidia and not curable.
I have a call into my vet as they were going to be seen tomorrow. It looks like a total cull and clean is in order.
Thankfully I've kept them in quarantine since I got them.
Thanks @KikisGirls@007Sean Check this necropsy report out.