I got these just in case my cat was sensitive to the ones with smell, but turns out he wasn’t so it’s hard to make a good judgement as to whether these make a difference. I know they have no odor so my cat wasn’t constantly trying to smell it. They look clean and fresh and I’m sure they’d be great for sensitive kittens! After the cat pees in it though you can see yellow spots! Lol. 3 stars though because my cat likes to eat them and it very scary! I don’t know what kind of harm that can cause. He got a few stuck in his teeth gums that I had to pull out!