• It costs U.S. taxpayers an estimated $2 billion each year to round up, house, kill, and dispose of homeless animals. (USA Today)
• 25% of dogs euthanized in animal shelters are purebred
• Over 56% of dogs and puppies entering shelters are killed, based on reports from over 1,055 facilities across America. (National Counsel on Pet Population Study)
• An estimated 5 million cats and dogs are killed in shelters each year. That’s one about every six and one half seconds.  (The Humane Society of the United States)  Millions more are abandoned, only to suffer from illness or injury before dying. (Doris Day Animal League)
• In six years one unspayed female and her offspring, can reproduce 67,000 dogs (Spay USA)
• Less than 3% of dog guardians are responsible for surplus births (Save Our Strays)
• The perceived high cost of altering is not the problem, but the lack of education on its benefits. On average it costs approximately $100 to capture, house, feed and eventually kill a homeless animal – a cost that ultimately comes out of our pocket. Low cost spay/neuter services are far below that amount. (Doris Day Animal League)
• The cost of having a pregnant female can be much higher than the cost of spaying
• Seven dogs & cats are born every day for each person born in the U.S.  Of those, only 1 in 5 puppies and kittens stay in their original home for their natural lifetime.  The remaining 4 are abandoned to the streets or end up at a shelter (The Humane Society of the United States)
• Each day 10,000 humans are born in the U.S. and each day 70,000 puppies and kittens are born.  As long as these birth rates exist, there will never be enough homes for all the animals (Spay USA)
• The public acquires 14% of its pets from shelters; 48% get their pets as strays, from friends, from animal rescuers, 38% get their pets from breeders or pet stores (The Humane Society of the United States)
• Only 30% of dog guardians are aware of the pet-overpopulation problem (Massachusetts SPCA survey 1993)
• In a study of relinquishment of cats and dogs in 12 U.S. animal shelters, 30% of the surrendered dogs were purebreds.  The same study indicated that 55% of the surrendered dogs and 47% of the surrendered cats were unaltered. (Journal of Applied Animal Welfare Science)

The Humane Society of the United States provided these statistics:

• Number of cats and dogs entering shelters each year:
  8–10 million (HSUS estimate)
• Number of cats and dogs euthanized by shelters each year:
  4–5 million (HSUS estimate)
• Number of cats and dogs adopted from shelters each year:
  3–5 million (HSUS estimate)
• Number of cats and dogs reclaimed by owners from shelters each year:
  Between 600,000 and 750,000—15–30% of dogs and 2–5% of cats entering shelters (HSUS estimate)
• Number of animal shelters in the United States:
  Between 4,000 and 6,000 (HSUS estimate)
• Percentage of dogs in shelters who are purebred:
  25% (HSUS estimate)
• Average number of litters a fertile dog can produce in one year: 2
• Average number of puppies in a canine litter: 6–10