Sheep shearing has been greatly simplified by crossing a sheep with a pair of long underwear.

9 seconds sound clip from the The Farm of Tomorrow (Tex Avery, 1954) movie soundboard.

You can hear this line at 00:05:07 in the Blu-ray version of the movie.

Quote context

[...]

- No more frostbitten fruit for the citrus farmer. We've crossed an orange with a fir tree.

- Here's one for you frustrated grocers. To discourage that vegetable-squeezing customer, we've crossed the tomato with a grapefruit.

- This umbrella cross solves the annual problem of what to do with the tree after Christmas.

- For the apartment house dweller with limited garden space, we've perfected the new potluck multi-plant.

- For the sheep rancher, we crossed a lamb and a dachshund. Five yards more wool per sheep.

- Sheep shearing has been greatly simplified by crossing a sheep with a pair of long underwear.

- Here's a sure thing for you two-dollar betters.

- We crossed a racehorse with a giraffe. He's a cinch to win by a neck.

- Here, we've crossed the old reliable stork with a big horn elk to accommodate you impatient newly-weds who are in a hurry for a big family.

- Ladies and gentlemen, before closing, we would like to find good homes, for these little leftover orphans of the Farm of Tomorrow.

[...]