This great storyboard drawing of the menacing wolf is courtesy my friend Dennis Books.
The Big Bad Wolf is looking at the Little Wolves (not seen) and commands, "Remember! No eats 'till I get back!" This art was created in 1937 for the short cartoon The Practical Pig, which was released in 1939.
Horvath was one of many great artists employed at The Walt Disney Studio during the heights of the Great Depression. This piece bears Horvath's signature in the lower right corner.