Blythc, The protozoa have a stage where they infiltrate certain cells. I have tried all those things. The proper treatment will have 'immediate' results. Tetracycline will yield immediate relief of some symptoms, but it is not enough. So does albendazole. These drugs are inhibitors. It takes a strategy to do this. Curedbycurezone has taken the right path, by researching a plan of action. I intend to do the same, with the guidance of my ability to monitor the progress. The same methods may not apply to other parasites.
BTW how do you know the chickens are free of protozoa? Shroom