The Causes of Overpopulation in Animals
Abandoned Animals; Abandoned pets increase the overpopulation statistics. While some pet owners keep their pets for life, others treat them as though they are disposable. Some of these animals are altered while others are not. When owners grow tired of pets, some take their unwanted animals to shelters, while others merely drop them off away from home to fend for themselves. The ASPCA reports "Approximately 5 million to 7 million companion animals enter animal shelters nationwide every year, and approximately 3 million to 4 million are euthanized (60 percent of dogs and 70 percent of cats)."
Environment; Environment plays a large part in the overpopulation of animals. Some animals are chosen over others and are provided shelter by humans. The animals that are taken in by humans are less likely to reproduce as 75 percent of animals, namely dogs and cats, that reside in rescues or in personal homes have been or will be altered. However, their homeless counterparts greatly contribute to overpopulation. According to the ASPCA, it's nearly impossible to give an accurate number of homeless dogs and cats in the United States as of 2011, but estimates approximately 70 million homeless cats alone. Animals that have never had a home most likely have not been altered and are free to reproduce, which creates more neglected animals.
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