Hello!
Some time back (HERE) I asked for help remembering the name of a creepy live action movie where a St. Bernard dreams of being chased by a man dressed as a terrifying skiing cat. Turns out it was called Fantasy on Skis, a 1962 film that later showed up on Walt Disney's Wonderful World of Color TV show. After a little research, I think I saw it in the theaters in 1975, when they rereleased Snow White. It served as a short subject before the main film. Watching the rest of the film provides PLENTY of other nightmare fuel…on skis! A scarecrow chases a pair of crows, cowboys (skiers wearing horse costumes around their waists) have a gunfight, Captain Hook chases Peter Pan…it's amazing. The cat part though IS especially terrifying, and starts at about the 24:50 mark (HERE).
Thanks to Dan S.—who had similar childhood memories of the film and managed to find the above link—for tipping me off!