Unspayed dogs will attract male dogs for up to 21 days, often twice a year, and similarly, cats, six to seven days, three or more times a year. Females in heat experience a blood flow that can stain your rugs and furniture. They also attract all the neighborhood males to your house. Female cats in heat will often cry incessantly and devise ingenious escape strategies in order to breed, and unneutered male cats will often exhibit spraying behavior in which they mark their territory with urine. Intact males are much more likely to cause trouble by running away from home, roaming the neighborhood, and getting into fights with other males.
Neutered animals are less likely to be aggressive or to bite humans.
Dr. Randall Lockwood of the Humane Society of the United States has found a much greater incidence of aggressive biting in intact animals. Of the more than twenty fatalities investigated over the last two years, we have found that none was caused by a spayed or neutered dog. In the City of Sierra Vista, the owner of a female dog in heat is legally obligated to keep her confined at home, in a boarding kennel or in a veterinary hospital, so that she does not come in contact with a male dog, and license fees for intact dogs, both male and female, are considerably higher than for spayed and neutered dogs. It's Simply Good Citizenship Uncontrolled and irresponsible animal breeding creates a growing burden on the community, and the taxpayers ultimately pay the price of controlling and disposing of these unwanted animals. Abandoned and homeless animals raid garbage cans, defecate on public areas or private lawns, angering and alarming residents.