J Red,
Who is this guy's direct Supervisor? Is it you? If its not you, bring it up to Catboy's boss. If it's you, then you have to go to a quiet place and explain that you or some other cowork has allergies to cats.
But with your luck, he'll come is smelling like human urine.
That's the main job of the Supes at my employer- sending out memos about appropriate use of perfumes, colognes, and God forbid lilacs (a person saw them, got so worked up, the allergies didn't get her- the ensuing panic attack did).
Oh the joys of middle management.
Today's email was regarding how space heaters are not allowed in the cubicles.
Hey, another 40 years and I don't have to deal with it any more.