There's a lot more on Lieber & Stoller's writing "Hound Dog" for Big Mama Thornton and her being furious when Elvis got all the fame for his version (with people thinking of it as "an Elvis Presley song") in this thread: Origins: Hound Dog.

Here are the lyrics usually sung by Willie May Thornton (as a rather slow blues:
   Jim Dixon's post of Mama Thornton's Hound Dog lyrics

"Though the song was written by the New York songwriting team of Lieber and Stoller ..., it is said that Big Mama changed a lot of the lyrics, making the song distinctly her own and bringing the sexual implications to the foreground.

And here are the lyrics as Elvis recorded them (a faster song with more repetitive lyric lines)