ABSOLUTELY! I even spay/neuter some that are not my pets LOL. Thousands are put to sleep DAILY in america how can you justify not spaying and neutering? If you want a cute puppy or kittens, go to the pound and get another.
I foster pregnant dogs from NC at least once a year. Every monday at this one pound in this one town every dog, usually 15-20 often more gets put to sleep. so very sad! Do the math for every town in just that one state. Crazy!