Stub, the Best Cow Dog in the World

"Stub, the Best Cow Dog in the World" is an episode of The Wonderful World of Disney, which aired on December 8, 1974.

Synopsis
The presence in the vicinity of a wild bull, threatening the purity of a herd requires the use of three Australian dogs, Stub, Queen and Shorty intended to neutralize the intruder enamored. Seventeen years later, Stub, a worthy descendant takes over.