Mine charges about £25 for the first appointment, then around £17 for a follow up and £12 for any subsequent ones. As someone else said, the size or type of animal isn't relevant, it's their time you are paying for. My previous vets used to charge an £8 flat rate for small animals like my bunnies (and very often they didn't charge me for consultations at all) but I now feel it's worth paying more to get better care. Although having said that, there isn't necessarily a correlation between fees and service!