Barkley is a full-bodied Muppet dog from the children's television program Sesame Street. Originally called Woof-Woof when he first appeared in the show's ninth season, he is energetic and playful, but not anthropomorphized like most Muppet animal characters. While he may exhibit human-like emotions, he communicates only through barks, yelps, and physical contact. He was Linda's guide dog and understood the American Sign Language signs for "sit" and "stay." However, he also had a close relationship with Big Bird. Although Linda has since moved on from Sesame Street, Barkley has remained, presumably becoming a ward of the community as a whole.
Barkley's only appearance in a Christmas special was A Special Sesame Street Christmas, where he helps the adults to get rid of the snow.