It costs much less to spay or neuter a pet than to raise a litter of puppies or kittens. When you factor in expenses like cleaning the carpet after your cat keeps using it as a litter box…and taking your unneutered male to the vet when he keeps getting into fights with neighborhood strays…and paying to replace the neighbor’s stuff he chewed up when he was loose and unsupervised…or the cost of….you get the picture!