Cat?

I too am curious about how this works with cats

I am skeptical about it, dkronfeld

Cats aren't as easily excitable as dogs, but you can definitely tell when they're happy about their sunbeam or their scritches or their food.

true

or zooming on nip or valerian

Cats have an internal rumble strip. Makes it easy!

Oh yes, that rumble is a big giveaway, especially with Chives. But watching the tail will tell you a lot too.