In less than a year, all those puppies will be grown dogs and able to have litters of their own. Neutered pets have no chance or drastically reduced chances of suffering from a great many health problems. These health problems can be costly and difficult to treat.
Neutered pets are more loving and better tempered pets.
Neutered dogs are less likely to mark their territory. The estrus cycle happens about twice a year for dogs. Neutered dogs are less likely to bite. Male dogs who are neutered are much less likely to run away or get into fights. With many millions of homeless animals, we are seeing an annual rise in dog bites and attacks, torn open garbage containers, feces in public and private areas, and angry, frightened citizens who do not understand the misery of these unwanted pets.