Lanolin Sheep is a U.S. Acres character and the second-to-last introduced main character in the strip (before Bo).
Usually shown as a pessimistic hard worker, but with a personality the polar opposite of her brother: loud and disagreeable; she tends to deny this. She is very blunt in her speech. In the comic strip, she was much more abrasive than in the television series. She revealed that she has wider arms and fingers than Roy during a fight, and was the only one who could put Roy in his place. In fact, she and Roy seem to enjoy picking fights with one another. She also seems to love pranking Roy as much as Roy loves pranking others.
Deep down Lanolin loves Bo, but she has a funny way of showing it. But she does have her kind moments, as shown when she holds Roy's beak closed while she and the other barn animals complimented the scraggly tree Bo had brought back. She also sometimes show kindness to Orson (mainly in the cartoon) as he seems to be the first person outside of Lanolin's family to show any kindness to her. She can also be protective of Bo when he's in danger.
- She is named after the sheep bearing product known as lanolin, which is a wool grease.
- As shown in the November 20, 1987 strip and Rooster Revenge, Lanolin's favorite food is possibly strawberry ice cream. On the November 20, 1987 strip, Bo teases Lanolin about strawberry ice cream supposedly being served for dinner instead of the usual slop. In Rooster Revenge, she, Booker, Sheldon and Wade are enjoying strawberry ice cream.
- Other than Blue, she is the only female U.S. Acres character.
- In the TV series and early books, her bow is blue. In all other media, her bow is pink.
- In the cartoon, although she shown to be grumpy, she's nice (at times) to Orson (possibly due to Orson showing kindness to her).