After a full day of work, Kelly stops by the Chicago shelter to check in on potential rescues. She leads a Pit Bull out into the yard for a little fresh night air, some exercise and a temperament test. It is estimated that 30-35% of the dogs euthanized are Pit Bulls. Unchecked breeding and the vilification of the breed has led to shelters overflowing with these powerful yet often untrained and frequently abused dogs. 2013.