If the doctor thought there were enough coccidia oocysts in the sample then you should trust him and treat. I am just suggesting treating 2-3 days in a row instead f once a week.It was because a pet blackbird died recently that was the fault of the coccidia, I went to take my duck to the veretinario he took the popo samples and he was the doctor because he came out with coccidia in the exam, he also came out with that had the flora Gut very low
before he is drinking a lot of water