08/17/2026
🐾 Mismarks in Labrador Retrievers: Naturally Occurring Doesn’t Mean “Not Purebred”
Every so often, a Labrador puppy is born with something unexpected: tan points, brindling, a white spot, white toes, a longer coat—or, in extremely rare cases, an unusual pattern caused by chimerism.
These traits can surprise people, but it’s important to understand the difference between a naturally occurring genetic variation and deliberately breeding for a non-standard trait.
It’s also worth noting that in the past, breeders did not routinely test for the genetic variants behind many of these traits unless they repeatedly appeared in a particular line. Today, however, many genetic testing companies offer panels that can identify the underlying genes responsible for these mismarks and coat variations, giving breeders far more insight than was historically available.
🖤 TAN POINTS
Tan-point markings can occasionally appear in Labradors when recessive genetic variants inherited from both parents come together. The markings may resemble those seen on breeds such as Rottweilers—typically appearing above the eyes, on the muzzle, chest and legs.
A Labrador with tan markings does not automatically become another breed simply because those markings appeared. However, tan markings are not permitted under the Labrador Breed Standard.
🐾 BRINDLE
Brindle markings may also occasionally occur. Rather than covering the entire dog, brindling in a Labrador may appear as streaked or striped markings, often on the legs, face or other localized areas.
The Labrador Retriever Club standard specifically states that black or chocolate Labradors with brindle markings are disqualified from conformation competition. (The Labrador Retriever Club, Inc.)
🤍 WHITE CHEST SPOTS & WHITE TOES
Small amounts of white are perhaps the most familiar Labrador mismark.
In fact, the Breed Standard specifically says:
“A small white spot on the chest is permissible, but not desirable.” (The Labrador Retriever Club, Inc.)
Larger white markings or white on the toes can occur.
🧸 LONG COAT
Occasionally, two normal short-coated Labradors can produce a puppy with a noticeably longer, fluffier coat when both parents carry the recessive genetic variant responsible for long hair.
It doesn’t create a new variety of Labrador—it is simply an expression of a recessive trait.
The Labrador standard calls for a coat that is short, straight and very dense with a weather-resistant undercoat. Woolly, silky or otherwise atypical coats are to be severely penalized. (The Labrador Retriever Club, Inc.)
🧬 CHIMERA — SOMETHING ENTIRELY DIFFERENT
Chimerism should not really be lumped together with ordinary inherited mismarks.
A chimera is an individual containing two genetically distinct populations of cells that originated from different zygotes. (NCBI)
In naturally occurring tetragametic chimerism, two separately fertilized embryos can fuse very early in development and continue developing as one individual. That individual can therefore carry cells from two different genetic origins. (PubMed)
In a dog, chimerism can sometimes produce dramatic differences in pigmentation or appearance because different areas of the body may contain genetically different cell populations.
This is an extremely unusual developmental abnormality, not a color that can responsibly be marketed as a new or “rare” Labrador variety.
⚠️ HERE’S THE IMPORTANT PART
Naturally occurring does not mean standard.
A purebred Labrador can occasionally produce an unexpected recessive trait or mismark. That does not mean responsible breeders should intentionally reproduce that trait, create a catchy name for it and charge more because it is “rare.”
The Labrador Retriever has three recognized colors: black, yellow and chocolate. Any other color or combination of colors is a disqualification under the standard. (The Labrador Retriever Club, Inc.)
There is a huge difference between saying:
“This occasionally happens naturally within the breed.”
and saying:
“Let’s intentionally breed for it and turn it into a designer color or variety.”
Responsible breeding is about understanding genetics, acknowledging that Mother Nature occasionally throws us a curveball, and continuing to breed toward the Labrador’s established type, temperament, health and purpose.
❤️ Preserving a breed doesn’t mean pretending genetic surprises never happen. It means understanding them—and knowing the difference between an anomaly and something we should deliberately reproduce.
