Theres a ton of money involved if you are a responsible breeder. Responsible breeders get their dogs vet checked, hip checked, eye checked, heart checked, etc....and get the pups shots when they need them and before they go to their new homes. Spaying and Neutering prevents unwanted litters and is healthier for the dogs. It reduces risks of most cancers. I know it must be exciting seeing the pups born and watching the mother take care of them, but spaying and neutering is probaly the best thing you could ever do for your dog.