Humane Society of Yuma struggling to keep up with number of pets coming in Published Humane Society of Yuma struggling to keep up with number of pets coming in Workers and volunteers say they're at maximum capacity and overwhelmed - 13 On Your Side's Luis Lopez reports Yuma, Arizona (KYMA,KCEY) - There's no room for any more rescues at the Humane Society of Yuma (HSOY) and that's making life difficult for the shelter's workers and volunteers. Since the Fourth of July HSOY has been working with a full capacity shelter. Over 180 pets have been checked into the shelter, and so far only 36 have been returned to their owners or rehomed.