Apparently all dragons have it in small amounts in their gut , it’s only a problem though when it flares up ( usually caused by bad husbandry or illness or stress including relocation stress) Some are more prone to it increasing and causing issues than others are.
He’s on baycox , which is only a 3 day course. It’s the cleaning of viv that I’m not sure how to go about for coccidia and it’s very hard to kill it. I’m pretty sure it will be bleach and water needed but I don’t know at what dilution