see more

LOS ANGELES - OCTOBER 26: Anna Britton, 88-years-old, reaches out to Kirby, a Pet Assisted Therapy (PAT program) dog dressed in a sheep Halloween costume while visiting with hospital patients at the Torrance Memorial Medical Center October 26, 2004 in Los Angeles, California. The PAT program began at the hospital in 1990 to bring specially-trained therapy dogs to patients' bedsides twice each week. (Photo by David McNew/Getty Images)

LOS ANGELES - OCTOBER 26:  Anna Britton, 88-years-old, reaches out to Kirby, a Pet Assisted Therapy (PAT program) dog dressed in a sheep Halloween costume while visiting with hospital patients at the Torrance Memorial Medical Center October 26, 2004 in Los Angeles, California. The PAT program began at the hospital in 1990 to bring specially-trained therapy dogs to patients' bedsides twice each week.  (Photo by David McNew/Getty Images)