
They are not rare at all all it needs a couple lines to a carrier of the blue gene like In Ch Rosehurst Chris on both sides of the pedigree for there to be one or more blues in the litter
Beware of a breeder who breeds especially for these"rare"colour they will be breeding for the money instead of breeding for the improvement of the breed
Anyone who breeds for coat type or colour does not IMHO have the improvement of the breed at heart, we have a local breeder who has gone from "whites(hers are a creamy/brown colour) to having the sable pattern in her litters she calls them champagne sables & charges the earth for them, her daughter has just mated one of her bitches to a half brother to get white sables-pity that the bitch is an epileptic & has at least one fit every day !