You may recall a couple of years back we all went to the Google Arts and Culture app to find portraits that looked vaguely like our selfies. Man I’m sure I wrote about this but can’t find the link. Anyway, Google Arts and Culture app will allow you now to locate animals that look like yours in paintings.
Post photos of your chonky cats along with historical paintings of their possible ancestors, or you know just find portraits that are close enough you can Photoshop your pet’s image in and it’s not particularly off.
With Rocky Bub Jackson (former foster, current down the street neighbor) which is the only good picture of a dog I have, it’s not doing particularly great at matching, but it did have one or two canine portraits that were at least in the same species.