Riche Bronson
Songster
Is it possible for a single chicken to catch cocci or is it only if you have multiple chickens because she is a single chicken I don't have any other ones the reason I'm asking is because I read that it is usually spread by an infected chicken
Yes it’s possible for just one to have it. Coccidiosis is found just about everywhere in the environment- but especially in wet environments where the oocysts proliferate. Coccidiosis is the reason that you feed chicks medicated chick starter feed. The feed doesn’t cure/treat it, it just helps the babies fight it off until they develop their own immunity to it. Your girl must not have had the vaccine (there is one for it). If they’ve had the vaccine the medicated chick starter is unnecessary. In fact, it nullifies the vaccine. She’s probably always had it, and has never had any symptoms until now. Maybe something else has got her immune system down a bit so she’s not able to fight it off.