I can't see if it's helping my cats teeth as they won't let me open their mouths, but the youngest kitten 4 mths really enjoys them. I was a little worried they would be too big for her as they are fairly big and round, but after pawing them around a bit she has no problem eating them. I bought them for my 12 yr old male who suffers with gingivitis, but unfortunately he doesn't eat them, but likes the kitten biscuits!