I am sorry you are having this problem with cocci!
I would:
Treat all chickens with corid at the medium dose for 5 days once a month for several months
And try to figure out if there is a husbandry change that can be made to reduce cocci at your place.
I would also get litter life from southland organics and spray the coops and runs with it
Thanks so much Ron!!!
I like your way of thinking, I am going to try a once a month program for a while to hopefully rid her of these things and allow for immunity. I am not sure why but its always just 1 bird. A Barred Rock. She had a horrible case if it at 8 months old and since then she is so prone. Not sure if her immune system is weak or what. She has always been under weight and not the healthiest specimen.
I think the birds pick this up while free ranging. We have TONS of wild birds and doves who are known to be loaded with Cocci. The migrating birds to New Mexico have even suffered great losses due to Cocci. So I'm thinking of keeping my birds indoors from now on.

