Good luck with that. Some one is always dropping off cats here. The Humane Society will give a discount on spay/neuter but no one does it for free around here. Can get shots at a discount too. The one vet will give the discount even if you don't have the pre-purchased certificate from the humane society. He just gives you the same price and doesn't make you go thru the red tape. Very nice of him but they don't all do that.