Genetics at a glance
| Genotype | b/b at the B locus (testable chocolate) |
|---|---|
| Loci involved | B locus (b) converts black pigment to brown |
| Typical UK price | £3,500 – £7,000 |
| Kennel Club | Outside the breed standard |
Chocolate turns every black pigment in the dog brown, coat and nose alike. Eyes are frequently amber or light green.
Testable chocolate versus cocoa
This is the single most exploited ambiguity in French Bulldog sales. There are two genetically distinct routes to a brown coat:
Testable chocolate (b/b) at the B locus is the classic brown found across many breeds, and standard DNA panels detect it.
Cocoa (co/co) is a separate mutation, largely specific to French Bulldogs, which produces a very similar appearance. Until relatively recently standard panels did not test for it, which produced a period where breeders could truthfully say a dog 'tested clear for chocolate' while it was in fact a visibly brown cocoa dog.
If you are paying a premium for chocolate, ask which gene, and ask for the DNA panel showing it. A modern panel tests both.
Health and cost considerations for this colour:
- Not Kennel Club recognised
- Often bred alongside dilution, compounding risk in lilac offspring
Buying at a colour premium? Get a written insurance quote for the specific dog before you pay a deposit — several UK insurers now load or exclude diluted coats. Our lifetime cost calculator applies the colour loading so you can see the difference over the dog's life.
What we would actually buy
Confirms dilution and cocoa status, and screens for degenerative myelopathy via SOD1 among other conditions. Useful if you are buying at a colour premium and want to verify what you actually bought.
Best for:Verifying a rare-colour purchase, or screening before breeding
Check current priceLifetime cover with per-condition limits that hold up against a single IVDD surgical episode. Compare the per-condition limit rather than the headline annual figure.
Best for:Owners insuring from the day of collection
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Common questions
What is the difference between chocolate and cocoa in French Bulldogs?
They are different genes producing a similar brown coat. Chocolate is b/b at the B locus and appears on all standard DNA panels. Cocoa is co/co, largely specific to the breed, and was historically missed by panels that only tested the B locus.
Are chocolate French Bulldogs Kennel Club recognised?
No. Chocolate is outside the breed standard and cannot be shown, although the dog can be registered as a non-standard colour.
Related reading
Colour genetics summarised for buyers. If you are planning a mating, DNA test both parents through an accredited laboratory rather than relying on appearance.