"A city that impounds and euthanizes 4,000 animals in 2001... but does not promote spaying and neutering will probably euthanize at least 4,000 animals a year in 2010. A city that institutes a subsidized spay/neuter program will likely euthanize significantly fewer animals in 2010 and save on a host of other animal-related costs as well."-- International City/County Management Association.
Why Spay/Neuter? Because it works!
Conservative estimates state that 1 low-cost spay/neuter prevents on the average 10 unwanted births in one year.