I have an idea, use quick drying glue instead of butter, it doesn't have to be buttered toast.
"If you throw a slice of toast with butter into the air, it will always fall with the buttered side down." and "A cat will always land on its feet." It doesn't say just "butter" it says a slice of toast with butter.
and also
"If you glue the toast's unbuttered side to the cat's feet, it will turn around very quickly and land in the same fashion as the one explained above. This device cannot be stopped from turning, and thus is very handy to use for digging and construction purposes."
lol.