Two hours?! I've never heard of any vet taking two hours with one animal, but that's good because it's like he really wanted to take the time to get to know Filou personally instead of just prescribing the usual standard meds. Sounds like a wonderful visit and a productive one too, and it also sounds like you're really on top of Filou's kidney issues which means he'll be around for a long long time to come...which is a wonderful thing!