I have a 3 1/2 month old frizzle Cochin bantam pullet that had bloody poop about 9 days ago. I immediately separated her and took a poop sample to the vet. The vet said she saw no sign of worms but did see a few cocci in the float test. I started the pullet on 1/2 tsp liquid corid in her quart sized waterer. I did a thorough cleaning of the coop and pen where her 3 flock mates are still living. I kept her on corid for 6 days (was told 5-7 days) so settled on 6 since I had seen no signs of cocci for 2 days prior to stopping treatment. For the next 2 days her poop was completely normal looking. This morning the blood is back! She has had no symptoms at all other than bloody poop. Her comb is nice and pink. She is eating and drinking as usual. She is alert and active. I have given her probiotics for 2 days. Her flock mates are showing no signs of cocci. She is still separated from them. I have her in a chicken tractor that I move every 2 days to keep her off infected ground. Any suggestions are appreciated!