Actually, that's the great Whitey hunter. I was flicking the pom-pom up around the corner of the landing on the stairs for Billy when it didn't come back with the normal pull. I looked up and saw Whitey had commandeered it.
He doesn't chase pom poms the way his brother does. It's more of a batting around like a stereotypical kitten with a ball of yarn, but he clearly likes it. I admit I get bored easily since he won't chase it like some beasts we know, but it's still nice to see Whitey enjoy himself.