The most right Schipperkes are solid black puppies, but there are other shades and they can be seen under the guidelines of certain kennel clubs, even if not most of them. Most of the other shades considered to occur in the breed are prohibited due to health purposes, such as the hue concentration of alopecia correlated with a blue concentration in certain species.
The AKC and FCI guidelines require a fully black dog, the Kennel Club (UK) requires all whole colors” but favors black. This implies that the normal shade of this species is black but only owing to the combination of other mutations, it can be turned into white, brown, or blue schipperke.
As for the scientific knowledge: two groups of mutations regulate the appearance of the Schipperke, the “B” mutation that creates the black coat, the “E” mutation that allows the dark color to be produced in the coat. Every Schipperke has both from each, and thus in several Schips, the position of the color in the chromosomes can be defined as “BBEE” with one word originating from every parent.
VetGen analysis on the genetic locus and the version that creates non-black skins has only recently been implemented to the publication. Variability in the “B” locus is commonly seen with “b” an additional and recessive trait that appears in shades such as brown or chocolate, possibly even blue. Variations in the “E” locus are often seen as “e” an alternate and unknown factor that stops dark pigment from developing in the fur. Both factors in this locus should be “e” to create a fawn or a blonde Schipperke.
The very first aspect that we have discovered is that every color is included in the schipperke requirements for Australia, New Zealand, and the United Kingdom. Although only blacks are permissible in the US and Europe.
As illustrated by the US Schipperke Club, there has been discussion of several other shades that dates back to the creation of schipperkes:
The concept that the colored schipperkes emerge in their past when someone’s wasp crawled over the wall and pounded some little schipperke, is large without reason. Schipperke has been appearing in other combinations since the norm was in effect previously.
At the Brussels conference of about 50 Schipperke enthusiasts in 1888, the proposed norm for Schipperke was examined and a range of line-by-line changes was introduced and decided on. Among such changes was the suggestion that perhaps the shades “chocolate, red, grey, and white” should be acknowledged as “equivalently appropriate.” The suggestion was “vigorously” rejected, but if the shades hadn’t already occurred they would obviously not have been stated.
Resistance to the idea of a Schip of a color other than Black is rooted in the conviction by some that it is evidence of a lack of pure Schipperke breeding, that it comes from some accidental cross-breeding and is not to be tolerated in a “purebred” dog.
So, essentially, it’s the age-old mixed breed stuff. Although it was completely normal, shades apart from black were not encouraged and thus sought to make it keep it quiet. UK breeders were the first one to modify the norm to enable many other shades.
They state very simply stated the fact here:
Color is a hereditary recessive mutation that is immune to all laws on the heritable traits. The main composition in Schipperke is black, and the genetic hue trait can be spread covertly for several years, emerging only when the sender is bonded to some other provider.