"I feed him ALL the time," Lentz told The Dodo, adding that he's the sweetest guy. But Holden's journey isn't over. The tumor had to be biopsied to see if it was cancerous. And Holden will still be looking for a forever home, once he's ready, despite his old age and health issues.
As she does with many of her foster dogs, Lentz keeps her friends, family and fellow dog lovers updated on Facebook. An update from last week showed a video of Holden learning to shake hands. "He may be old and he may or may not have cancer (biopsy not back yet)," Lentz wrote, "but someone is going to be VERY lucky to have this dog."