Not quite what I was after as I was looking to pull his hid but since Cheetah! - Maltese Black Chinchilla is the most recessive its proof of dominance to that at least and gives us a range
Dominant to Cheetah! - Au Natural
Friedrick hides Cheetah! - Au Natural
Friedrick is Elva's grandfather, her Chateau Cat - Toffee Caramel cannot have come from Beorht as he must hide Ocicat - Platinum or more recessive from Friedrick
Therefore when Friedrick & Elva produced a Cheetah! - Au Natural, it was a result of both throwing Friedricks hidden fur, hidden in Elva via Beorht.
Rafela & Friedrick produced a Foxie - Fluff No.1, the baby hides at least Cheetah! - Au Natural
Additionally Rafela's mum Dandelion passed Cheetah! - Au Natural today, not definitive in itself as I can't go back far enough to confirm the line predates Cheetah! - Maltese Black Chinchilla but its a good bet.
As a final confirmation I checked the dates on Friedricks grandparents, they were unpacked on 15th November 2021, predating the discovery of Cheetah! - Maltese Black Chinchilla