We once had a cat that ate melon in preference to the Parma ham the rest of us were having with the melon!
When I was a child I had a cat that ate Danish Blue cheese, raspberry jam on bread and butter and Christmas cake.
IMO adult cats know what they need and like, and what is good for them. I would only worry if a kitten stole something odd, as it may not have the sense to know what is bad for it.
Changing from a Manual car to an Automatic after driving manual for around 50 yrs
