Filou and Tigris have never been dewormed -being inside kitties. They keep their weight and are healthy.

I used to take them to the vet once a year but have started to do it every 2 years as I think they shouldn't be vaccinated too often ( I have read a lot of stuff about that and my vet says it's ok for indoor kitties).

Have you never met a human doctor (e.g. a gyn) who wanted to see you more often? Most of the time if you ask them whether you really need it they say no.