Heathcliff and the Catillac Cats (1984)

S1E41 Going Shopping

Iggy and Marcy bring Heathcliff with them to shop for an anniversary present for Grandma and Grandpa Nutmeg. As they navigate the department store, Heathcliff takes advantage of every chance to create chaos, even attempting to steal a rhinestone collar for Sonja to replace the one she recently misplaced. However, on their way back, Heathcliff discovers Sonja's lost collar in the grass, turning him into a hero in the process.