Spaying or neutering your pet is a simple procedure, usually done in one day.  It means removing their reproductive organs.  This procedure is commonly performed when your pet is between the ages of 3 to 6 months.  There are many reasons why you should seriously consider doing this:

1.  It helps dogs and cats live longer and healthier lives.
2.  It reduces the risks of health problems which may be difficult and costly to treat, such as uterine, ovarian and breast cancer in females and testicular and prostate disease in males.
3.  Cats are less likely to spray and mark their territory.
4.  Both dogs and cats are less likely to run away and get into fights, sustaining injuries that may be costly to the owner or actually losing their lives.
5.  Animal over population, ie:  animal shelters are overburdened with a surplus of unwanted animals, which are quickly euthanized and cost communities millions of dollars controlling unwanted animals.
6.  Stray and feral animals suffer agonizing deaths, such as starvation, freezing, being hit by cars or dying of disease.
7.  There are not enough homes for mixed or purebreed animals.  Believe it or not, shelters receive purebreds everyday!  (Most responsible breeders have homes for their animals before they are born!)

CONTACT LOCAL SHELTERS IN YOUR AREA FOR LOW/COST SPAY/ NEUTER INFORMATION. 

Here are a few links for further spay/neuter information:

HelpingAnimals.com

American Humane - Empowering action since 1877.