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Because Lab coloration is controlled by multiple genes, it is possible for recessive genes to emerge some generations later and also there can sometimes be unexpected pigmentation effects to different parts of the body. Pigmentation effects appear in regard to yellow labrador puppies for sale, and sometimes chocolate, and hence the majority of this section covers pigmentation within the yellow Lab. The most common places where pigmentation is visible are the nose, lips, gums, feet,tails, and the rims of the eyes, which may be black, brown, light yellow-brown (”liver”, caused by having two genes for chocolate),20 or several other colors. A Lab can carry genes for a different color, for example a black Lab can carry recessive chocolate and yellow genes, and a yellow Lab can carry recessive genes for the other two colors. DNA testing can reveal some aspects of these. Less common pigmentations (other than pink) are a fault, not a disqualification, and hence such are still permitted to be shown.20

The intensity of black pigment on yellow labs for sale is controlled by a separate gene independent of the fur coloring.20 Yellow hunting s for sale usually have black noses, which may gradually turn pink with age (called “snow nose” or “winter nose”). This is due to a reduction in the enzyme tyrosinase which indirectly controls the production of melanin, a dark coloring. Tyrosinase is temperature dependenthence light coloration can be seasonal, due to cold weatherand is less produced with increasing age (two years old onwards). As a result, the nose color of most yellow becomes a somewhat pink shade as they grow older.20