He had his kidney function tested last summer, came back fine, but the test also revealed that he was mildly anemic.
Yes, he is a snuffles bun, it is mild but chronic. Not sure what bacteria though, as had a C&S test done but nothing grew.
He has always drunk loads, when I first got him he drank about a litre a day, this went down over time (vet dismissed it as behavioural, a stereotypy from likely being bored in a hutch all day, as we didnt know anything about his past) and then peaked last summer in the heat wave, went up to nearly 2 litres a day between the two buns, it was mostly Barney though. That was when I had his kidney function tested, as that really worried me. Since then it has dropped again, currently it is maybe 600-800ml between them, depending on the weather.