These are nice quality toys and would definitely help keep your cats' teeth clean if they actually chew on it. My cats did not seem to enjoy chewing on them, though. We have three cats. The smallest one thought they were too heavy to play with, so she lost interest immediately. Our middle child batted one around for a couple days until the catnip insert wore off, then he got bored. Our chonky boy spent the most time playing with them - he kicked a shrimp around, rubbed on it, carried it around iSee full review