Sis Cow is a minor character in the Uncle Remus comic strips.
Background
Origins
Sis Cow is a character from the Uncle Remus folktales adapted and compiled by Joel Chandler Harris.
Appearances
Br'er Rabbit an' th' butter business
Br'er Rabbit would tell Sis Cow about Br'er Fox and Br'er Bear's plan to sell ten cents a pound of butter to ruin her business. So, she writes a letter for Br'er Rabbit to give to her cousin, Br'er Bull, to warn him about their plan.