Tom & Jerry (Chuck Jones era) S01E34 - Purr-Chance to Dream

Tom wakes up after a nightmare of being turned into a nail-shape and pounded into the ground by a giant bulldog. When he sees Jerry catching a bone, he flicks the bone with his finger and then Jerry wallops him on the head with it and runs off, stopping at a giant dog house. When Tom approaches it, he realizes it wasn't a dream and runs off in horror.