Lacey is a rotund, old girl who doesn't play or show interest in toys. But on a whim, I purchased a catnip-infused fishy thingie. She did make a bit of a fuss over it – at least for a day or two. When not actively playing, she would often lie near it for those few days. I am guessing that the catnip soon lost its potency, for she lost her interest. It did make us both happy for awhile.