I have one hen that I treated multiple times but still has coccidiosis and her stools a r e managed through probitoics and apple cider vinegar
I use medicated chick starter for that reason and they were not vaccinated against it no other hen has had issues but her
Is the persistent coccidiosis vet confirmed by test or being symptomatically diagnosed at home? If it is truly persistent coccidia sis that would seem to indicate underlying issues preventing the development of the birds own response to the local cocci it is being exposed to