During its ongoing ban on Pit Bulls, the city of Denver, Colorado has systematically euthanized over 550 Pit Bulls - whether or not they've bitten or acted aggressively in any way. In many instances, just "looking like" a Pit Bull was reason enough for a dog to be seized from a backyard and destroyed.
Denver Pit Bull owners moved from the city to places like Boulder. Oddly enough, in 2008, 207 dog bites were reported. Only nine of those were from Pit Bulls. Read how the city of Boulder has used its dangerous dog law to train owners and control aggressive dogs rather than try to label or extinguish an entire "breed."