Replies on Dog Teeth Cleaning: DIY At Home

Hi Poppy, and welcome to the Vital Animal discussions!
I readily admit a lot of cats will do just what yours have done, especially if they are over about 6 years of age. Types of bones are typically poultry, but as Melissa says, hers take to ribs even. (I've asked her for more input about how she's interested her cats in this wonderful activity).
The biggest thing I see in cats is that they really need to smell what they eat, so cold bones or meat must be warmed to at least room temp. And then, there's hunger, often missing if cats are free choice fed.
Sometimes, it takes playing "hard ball" and offering meaty bones for several times as the only option for cats, over a few meals or even days. This can best be done in cats who are not overweight. It's fasting, really, and I talk about that further in Back Away from the Kibble, Kitty.
Cats are experts at training us!