I do. I live in a place that has too many stray dogs and feral cats. For me, the matter is not so much ideological as it is practical. My dogs are both spayed/neutered, vaccinated, and registered. There were times during these dogs' lives that I cut down hard on my own food to make sure they were healthy and well cared for.
My dog is a total house dog. She is walked on leash for an hour or so each morning, and has a good workout playing with the other dogs at our very nice little town’s doggie park, which is tax payer supported, every late afternoon.