I put cat mint in, but it is like a drug to the cats, their eye lids sit right back and we can't get them into their house at bed time. They go bonkers so I just took it out. We have two cats, one very expensive pedigree ( gift to daughter), one rescue cat, great company in the garden, but the rescue cat, Oliver, dumps all over my beds and digs it down six or eight inches. Not a pleasant surprise, but since they are great company wandering around me in the garden it is no trouble.