Neutering your male dog or cat prevents testicular tumors
and may prevent prostate problems. Neutering also
decreases the possibility of perianal tumors and hernias,
which are commonly observed in older, unaltered dogs.
Because neutered cats are less likely to roam, the threat
of abscesses caused by bites and diseases transmitted by
fighting are greatly reduced.
Males neutered early in life are less aggressive toward
other males and are not distracted by females in heat.
Therefore, a neutered male will be less tempted to leave
your property and cross that dangerous highway searching
for a mate. Neutered males also are less likely to mark
every one of your (or your neighbor's) expensive shrubs
with his urine as well as inside the house.
Each year, millions of unwanted dogs and cats are
euthanized (killed) at shelters across the country.
Although pet behavioral problems are the main reasons
animals are given to shelters, many orphans are the
result of accidental breeding by free-roaming, unaltered
pets. The more pets spayed or neutered, the fewer dogs
and cats will have to be destroyed.