Who are the DEN CATS? They’re a squad of more than 100 dogs—and one cat— representing more than 40 breeds. As the largest airport therapy animal program in the country, the DEN CATS is made up of four-legged volunteers who delight travelers with a friendly wag or furry cuddle. You’ll encounter them throughout the airport, sporting their distinctive blue plaid “Pet Me” vests. Hug, pet, and take pictures with DEN’s affectionate comfort crew!