The Adventures of Black Beauty (1972)

S2E17 Where's Jonah?

Ned chooses to play circus games with Jonah rather than completing his chores, which frustrates Dr. Gordon. When Alf and Wilt, two traveling circus performers, come through town, Ned contemplates running away but ends up getting tricked out of Jonah. Now, Ned and the doctor must enlist the help of Black Beauty to retrieve the pony.