Sparrow is a golden retreiver service dog-in-training. His owners traveled from Europe to Disney World for a training program there. It was there that Sparrow met his furriest cousin, Chewbacca. Once Sparrow was given the signal that he was off duty, he nuzzled up to Chewbacca and the two had a moment. You can see some quick video here.
Later he met up with Jessie from Toy Story.
Now let's talk about service animal King Henry of Nashville. Henry and his handler Jessica took the Magic Kingdom by storm. He got a pup cup from Starbucks. He wore Dumbo ears, and even met "Kevin" from UP!.
Quick reminder, certified service dogs are allowed at Disney World, but you should check with the happiest place on earth before you go so you can make sure you're in compliance with the rules.