The New Adventures of Winnie the Pooh - Season 3 - Eps 14: The Bug Stops Hare
Pooh is babysitting Owl's nephew, Dexter, and Roo. They and the rest of the gang are invited to Christopher Robin's house so they could see his science project, which is an insect. But the gang accidentally lets the bug loose and soon agree that they will find a replacement bug for Christopher Robin.
About The New Adventures of Winnie the Pooh

Title: The New Adventures of Winnie the Pooh
First Air Date: 1988-09-10
Last Air Date: 1991-10-07
Status: Ended
Rating: 7.7/10 (from 238 votes)
Language: EN
Seasons: 5
Total Episodes: 82
Network: ABC
Genres: Family, Animation, Comedy, Kids
Production Companies: Disney Television Animation
Synopsis
An American animated children's television series inspired by A. A. Milne's Winnie-the-Pooh stories.
Cast

John Fiedler
Piglet (voice)

Jim Cummings
Winnie-the-Pooh / Tigger (voice)

Ken Sansom
Rabbit (voice)

Peter Cullen
Eeyore (voice)

Hal Smith
Owl (voice)

Patricia Parris
Kanga (voice)

Michael Gough
Gopher (voice)

Nicholas Melody
Roo (voice)