Variants ...

Although kennel clubs and registries recognize the Labrador in variations of only three colors—black, yellow, and chocolate—some breeders sell light-colored yellow Labrador puppies as a "white" labrador, the dark yellow Labrador puppies as "fox red," or chocolates possessing the dilution factor as "silver Labradors". The "silver" color is nonstandard and would disqualify them as show dogs. However, the "fox red" and so-called "white" labs (more properly referred to as "cream" by the AKC) are perfectly acceptable shades for a Yellow lab in the show ring. See the AKC website for a more complete discussion of Yellow Labradors. The dog's color does not affect its behavior or health and many people own "silver" labs as companion dogs.

Breeding

Black labs have dominated the field trial and hunt test scene. Because the lighter variants are a recessive trait, breeding for a litter of yellow or chocolate pups requires mating two dogs with those traits. This means that dogs from these litters were selected for traits other than nose, biddability, intelligence, and hunting desire. Because even a pairing of black labs may produce chocolate or yellow offspring, this rule does not hold 100% of the time. Even so, many serious field trialers and hunters prefer black labradors over the other variants to increase the odds of solid hunting genes.

Physical build

In addition to color variations, differences in the physical build of the dog have arisen as a result of specialized breeding. Distinct lines are bred for specific purposes. Dogs bred for field trials tend to be lighter in limb and often lack the very large, square head, shorter legs, and heavier bodies seen in the show ring. Differences tend to occur as dogs bred for hunting and field-trial work are selected first for working ability, whereas dogs bred to compete for show championships are selected for what judges look for in the show ring. In fact, breeders and owners sometimes distinguish the "working" Labrador from the "show" Labrador, given the marked differences in their physical characteristics. The majority of dogs bred are generally some where between what is displayed in the "show" Labrador and what is seen in the "working" Labrador.

Labradoodle and other crosses

The Labradoodle is a common mixed-breed dog that combines a Labrador with a Poodle. These dogs are popular for their hypoallergenic qualities.

Labrador-German Shepherd and Labrador-Border Collie crosses are also rather popular, at least for their intelligence and working qualities.