It helps to reduce companion animal overpopulation.
An increasing number of pets are losing their homes or are surrendered to animal control organizations. In the United States, that number is in the millions. There are 45 times as many cats, and 15 times as many dogs, as there are humans. These animals need our help to humanely reduce overpopulation until there are good homes for them all.
It increases the chances of a long and healthy life.
Altering dogs increases life expectancy an average of one to three years; for cats, it is three to five years. Altered animals have very low to no risk of mammary gland tumors, prostate cancer, perennial tumors, pyometria, or uterine, ovarian, or testicular cancers.
A sterilized pet is a better pet.
Neutering reduces the urge to roam and decreases the risk of contracting diseases or getting hurt. Surveys indicate that as many as 85 percent of dogs hit by cars are unaltered. Unaltered male cats living out-of-doors have been shown to live on average less than two years. Intact cats are more likely to get into fights, increasing the risk of contracting some fatal diseases which are spread by bites.
Your community benefits.
According to the American Veterinary Medical Association, stray and unwanted animals are becoming a very real concern in many places. They can easily be regarded as a public nuisance—soiling parks and streets, frightening children and the elderly, creating noise and other disturbances, causing automobile accidents, and sometimes even killing livestock or other pets. As a potential source of rabies and other diseases, these unfortunate animals can also become a public health hazard.
Each year, the capture and destruction of unwanted cats and dogs costs taxpayers and private humanitarian agencies more than a billion dollars.
Spaying and neutering is an effective response to overpopulation.
Statistics compiled by Merritt Clifton, editor of Animal People:
1970 23.4 million euthanized
Then people began fixing pet dogs.
1985 17.8 million euthanized
Then people began fixing pet cats.
1993 5.7 million euthanized
Then people began fixing feral cats.
1997 4.9 million euthanized
But Pit Bulls, the breed of dog most likely to be euthanized, had begun population explosion.
2000 4.2 million euthanized
Then 9/11 led to the loss of funding that had previously been used for spaying and neutering.
2004 4.9 million euthanized
Now, Pit Bull intake is rising toward 33% of all dog intakes and is over 50% in many big cities. The euthanasia rate is 93%.