Is she lethargic? Usually, chicks/chickens with Cocci are lethargic. Also, it's not near as common for them to get Cocci as adults as it when they are chicks. Is she still pooping bloody? Is there any way you could get a picture of her poop to post? It tells a lot. Here's a link that has pictures of several "normal" poops for reference:
http://www.chat.allotment.org.uk/viewtopic.php?t=17568
http://www.chat.allotment.org.uk/viewtopic.php?t=17568