Review title is Only 2 cats liked it [SEP] 2 of my cats regularly walk under a U shaped wire brush toy to groom themselves. Another likes to go chew on the brush. The 4th cat always grooms his chin on a prickly squishy ball.<br />The brushes that arrived are hard plastic. Instructions were not included, so I had to revisit the website before pouring catnip in the back of the wall brush. Everyone sniffed it but only 2 tried to rub up against it. At first I had it secured to the bottom of a stool, but once I attached it higher up the legs, the cats nudged at it. It’s been in the cat room for over a week. The cats have not paid it much attention. I moved near the other grooming toys, but no improvement. Maybe the catnip is not so potent or maybe I need to pour the entire bag inside? Not sure? Will continue to move brushes to new locations & see if interest gets peaked.