Petie and Denver Learn About MS introduces Denver, a new friend the crew meets while Trick-or-Treating. He’s a cowboy loving dog who likes to play with building blocks, his favorite color is blue, and he happens to have Multiple Sclerosis. Denver explains to Petie and her friends about his illness and how it effects him. And just like with every other new friend, the crew helps him realize that it’s okay to be a little different, and it will all be okay!