i am not CP, but we pay £22 for females and £16 for males - no idea what the rescues vet charge the public though, but we tell people who adopt our kittens that if they go back to our vet, spay/neuter is included in the adoption fee, they just have to show the vet the adoption paper. I am talking to our treasurer this week, as I want to chase up just how many people use this.