By having your pet spayed or neutered, you will do your part to prevent the birth of unwanted animals. What's more, you could be setting your pet up for a longer life, as studies have repeatedly shown that spayed or neutered dogs and cats live longer, on average, than other dogs and cats. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.