How dilute works
A third gene, the D locus (MLPH), can “dilute” pigment when a dog carries two recessive copies (dd).
| Base color | + dd | Common name |
|---|---|---|
| Chocolate (E_bb) | dilute | Silver |
| Black (E_B_) | dilute | Charcoal |
| Yellow (ee) | dilute | Champagne |
Because d is recessive, two normal-looking chocolates can each carry one d and produce a silver puppy.
The controversy
The AKC standard lists only black, yellow and chocolate, so silvers are registered as chocolate. Many breed enthusiasts argue the d allele wasn’t historically present in Labs and arrived through crossbreeding. Others disagree. Either way, a breeder who markets silver puppies at a premium as “rare” is a reason to ask more questions. See choosing a breeder.
Health consideration: color dilution alopecia
In several breeds, dilute dogs can develop color dilution alopecia: hair thinning or loss and skin infections in dilute-colored areas. Many dilute dogs never have it. If you own a silver, watch for coat thinning and itchy, flaky skin, and see your vet early.
How to know if your Lab carries dilute
A DNA test that reports the D locus answers it. Most consumer panels do. Compare options in best DNA test for Labs.
For the basics behind the B, D and E genes, see how Lab coat color is inherited, or predict a litter with the coat-color calculator. The AKC breed standard explains how dilute colors are registered.