Daffy Duck and the Dinosaur is a 1939 Warner Bros. Merrie Melodies animated cartoon short directed by Chuck Jones.

Casper uses a slingshot to fire a rock at the duck who, until he realizes the danger, is casually floating along in a lake.

Finally, Daffy slides to a halt and, disguised as a traffic cop, causes the rock to wait while a swan crosses, as though at an intersection.

Fido, bending down to peer between his legs to see where Daffy has gone, has his head impacted by the rock.

As he dives in, Daffy holds up a sign which indicates no swimming is allowed; Casper freezes in mid-dive then retreats to shore.

Daffy gives the caveman a glass of water, which cures the issue and results in Casper thanking the duck and offering to shake hands.

Daffy gives him a card advertising "...the biggest, most luscious Duck..." Casper and Fido head off in the direction indicated on the card, following a series of billboards (parodying advertising techniques of the era, including references to "The Breakfast of Champions" and "The Pause that Refreshes") Daffy has erected.