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 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.