So,how old is Henry? I must have missed that part. Chaserla, we used to use those on horses to remove shedding hair, or scrape off water after bathing--it looks awful, but the little teeth are so short that they won't even go through to the skin on a very thin coated horse. I also used it on a Siberian Husky I had that shed mountains of fur every spring. I guess the cat version must be much smaller, but you would be surprised at how well animals take to it; unless your cat hates being brushed anyway, he/she might like it.