I've tried this several times over the years. The cats me spray it watch with mild curiosity (or amused contempt; it's hard to tell for sure), wait for me to move out of the way, and then re-mark their territory.That's the good news. The bad news is that the pump sprayer was designed for use by King Kong: I'm just not strong enough to push it down with my thumb, and have to use the heel of my hand. So, the spray goes on my hand, but the cats don't seem to mind: they sniff the hand, then want me to pet them.Maybe this stuff's actually catnip?