Suggestions on finding this boy's hidden fur?

[HappyDaize Resident]

Yes.. keep pairing him to a recessive mate. Sometimes the cats are uber stubborn.

For example... this Tonkinese Champagne girl of mine, bred to a more recessive fur, kept refusing to pass her shown fur.
It took seven go rounds before she finally gave me a single Tonk Champagne furred offspring... and then she tossed her recessive fur again on the eighth go.