Uncle Barnum is presumably an anthropomorphic dog.
A circus owner, Barnum is an uncle of Goofy's and somewhat lackadaisical about his handling of tamed beasts: in 1957, having to go out of town, he left his two white tigers (whom he described as "kittens") in the care of his nephew Goofy.
Behind the scenesEdit
Uncle Barnum is mentioned in the 1957 one-pager Tiger Pets.
He is, naturally, named after famed showman P. T. Barnum, who also has a counterpart in the Disney comics universe.