Shadows moving where they shouldn't will be the most obvious clue. They make no sound, and have no obvious sources. The scent will confirm it is indeed the same rabbit which was, honestly, starting to get as confused as Katt would be. After all even it can tell that its destination is not where it was headed.

There's something else in the air, though. Perfume. It's sweet, not overly strong, but still obvious against the forest's backdrop. Coming from... thataway, if the tiger-lady is curious. Some of it's coming from the area of those shadows, too. Coincidence? Hardly.