Es gibt sogar die Theorie, dass das Dilute Gen durch ein Weimeraner Einkreuzung in den RR kam.

1957 schreibt der Rasse Experte Major Tom Hawley in seinem Buch "The Rhodesian Ridgeback, The Origin, History, and Standard of the Breed" : "The erstwhile brindles and mousecolours have long since entirely disappeared." On the other hand there are reports saying that they were a normal occurrence in South Africa up until the 1950's, but they were rare. On a Dog Show in Poland a diluted ridgeback was shown and got "excellent".

Das 1944 von Walter W. Weber gemalte Bild scheint dies zu bestaetigen, denn der RR links oben sieht "diluted" aus.