The shelter doesn't spay or neuter the animals they give you a voucher for your vet, that's free, but it doesn't cover the entire cost. The ending cost will be up to your vet.
I would imagine the cost of a gift certificate cost the amount you put into it regardless if you get a cat or dog spayed or neutered now my advise is to call them ahead of time and ask if those services are available just look them up on line and you can get their number there Hope it all works out well and good luck
Thanks! Your answer is awaiting moderation.