The Frog Stole In On Little Cat Feet
You can only rightfully claim that a cat walked across your keyboard and messed up the spelling of a word when there are too many letters in use.
If there are too few letters, we can infer that you are the guilty party.
P.S. Any claims to the feline in question having pressed backspace only makes your attempted cover-up more apparent. Cats never make mistakes and therefore have no use for a correction key in their life.