ChocolateLabs
Coat Color & Genetics
Short answer: a “Dudley” Lab is a yellow Labrador with a brown (liver) nose, eye rims and foot pads instead of black ones. It’s genetic: the dog is yellow because it has two copies of the recessive e gene (ee), and its skin pigment is brown because it also has two copies of the brown gene (bb). That’s the same brown gene that makes a chocolate Lab chocolate. A Dudley is a purebred Lab; it just has less common pigment.
Dudley Lab genetics
Two genes explain it (UC Davis):
- E locus (MC1R). A Lab with two e copies (ee) can’t put dark pigment in its coat, so the hair is yellow. Dark pigment still shows in the skin, though: nose, lips, eye rims and pads.
- B locus (TYRP1). Two b copies (bb) turn that dark pigment from black to brown. UC Davis’s test notes say bb “will change nose and foot pads from black to brown, even in e/e dogs with red or yellow coats”.
| Genotype | Coat | Nose, eye rims and pads |
|---|---|---|
| ee BB or ee Bb | Yellow | Black |
| ee bb | Yellow (“Dudley”) | Brown / liver |
| E_ bb | Chocolate | Brown |
| E_ B_ | Black | Black |
So a Dudley puppy needs a brown gene and a yellow gene from both parents. That can happen with two chocolates that both carry yellow, two yellows that both carry brown, two blacks that each carry yellow and brown (Ee Bb), or any other pairing where both parents carry e and b. Run a pairing in the coat-color calculator, or read how Lab color is inherited.
How to tell a Dudley from snow nose
Several things can make a yellow Lab’s nose look light. The AKC’s advice is to check the eye rims and gums as well as the nose.
| What you see | Likely cause | Permanent? |
|---|---|---|
| Brown/liver nose, eye rims and pads from puppyhood | Dudley (ee bb) | Yes |
| Black nose that fades to pink or brown in winter, darkens in spring | Snow (winter) nose | No, it’s seasonal and often repeats every year |
| Pink nose and pink eye rims, no pigment at all | Rare lack of pigment | Yes |
| Nose that’s dry, cracked, crusted or sore | Possible medical problem | See your vet |
The AKC says snow nose affects many breeds, including Labradors, and that the cause isn’t known. A Dudley’s color, by contrast, is set by genes from birth. A DNA test that reports the B locus will confirm it: a yellow that tests bb is a Dudley. See best DNA test for Labs.
The word “Dudley” isn’t always used the same way. The AKC article uses “Dudley nose” both for a yellow Lab with chocolate pigment and in discussing dogs with almost no pigment. Most Lab owners and breeders mean the brown-nosed yellow.
What the breed standard says
The AKC Labrador standard says the nose “should be black on black or yellow dogs, and brown on chocolates”, and that nose color fading to a lighter shade is not a fault. The show-ring disqualifications are a thoroughly pink nose or one lacking in any pigment, and eye rims without pigment. A brown-nosed yellow departs from the ideal described in the standard, so it’s not what show breeders aim for. For a pet, it makes no difference. See the Labrador breed standard explained and the yellow Lab guide.
Are Dudley Labs healthy?
There’s no evidence that the brown nose itself causes health problems; it’s the same pigment a chocolate Lab has. Two practical points:
- Sun. The AKC recommends dog-safe sunblock for pink, unpigmented skin during long periods outside, to avoid sunburn.
- Changes. A nose that changes texture, cracks, crusts, bleeds or seems painful isn’t a color quirk. See your vet.
Otherwise a Dudley has the same breed-wide risks as any Lab: ear infections, weight gain and joint problems. Start with common Lab health problems.
Dudley Labs and “rare color” prices
A Dudley isn’t a separate color and shouldn’t carry a premium. Be wary of breeders who market unusual pigment as “rare”. The same goes for silver, charcoal and champagne Labs; see silver Labs explained. If you want to compare costs, read how much a chocolate Lab costs.