Understanding French Bulldog DNA Panels

This guide helps French Bulldog breeders understand how to read and interpret an Embark DNA report. Many breeders receive detailed DNA panels but are unsure how to translate those results into practical breeding knowledge. This document walks through the major color related sections of an Embark report and explains what each result means.

DNA testing allows breeders to see genes that may not be visible in a dog's coat color. A dog may carry genes for blue, cocoa, cream, or chocolate even if the dog does not visually show those colors. Understanding these hidden genes helps breeders predict possible puppy colors and avoid surprises in a litter.

Agouti (A Locus)

The Agouti locus determines the base coat pattern of the dog.

• AY/AY – Clear fawn

• AY/AT – Fawn carrying tan points

• AT/AT – Tan point pattern

  
  

Many French Bulldogs appear fawn because the AY gene is dominant over the tan point gene.

Blue Dilution (D Locus)

The D locus determines whether a dog expresses blue dilution.

• D/D – Dog does not carry blue

• D/d – Dog carries blue but does not visually appear blue

• d/d – Dog will appear blue

  
  

A dog must inherit two copies of the dilution gene to appear blue.

Testable Chocolate (B Locus)

The B locus controls the gene responsible for testable chocolate coloration.

• B/B – No chocolate

• B/b – Chocolate carrier

• b/b – Chocolate expressed

  
  

Cocoa Gene

Cocoa is a separate brown based color that is common in French Bulldogs.

• Co/Co – No cocoa

• Co/co – Cocoa carrier

• co/co – Cocoa expressed

  
  

Cream (E Locus)

The cream gene prevents dark pigment from appearing in the coat.

• E/E – Normal pigment expression

• E/e – Cream carrier

• e/e – Cream coat

  
  

Cream coats can hide many other color genes underneath.

Pied and White Spotting (S Locus)

White spotting genes create the pied pattern seen in many French Bulldogs.

Large white areas can also allow patterns like ticking or skin pigmentation to appear.

Example Embark Color Panel Interpretation

• Agouti: AY/AT

• D locus: D/d

• B locus: B/B

• Cocoa: Co/co

• E locus: E/E

  
  

This dog would appear visually fawn but carries both blue dilution and cocoa.

If bred to another carrier, puppies could inherit blue, cocoa, or combinations depending on the genes inherited.

Common Breeder Mistakes When Reading DNA Panels

• Assuming the visible color shows all genetics

• Confusing cocoa and chocolate

• Forgetting that cream hides other colors

• Looking at only one gene instead of the entire panel

Breeder Tips

• Always read the full DNA panel before planning a breeding

• Remember that carriers can pass genes even if they do not show the color

• Use DNA results together with health testing and structural evaluation

• Prioritize health, temperament, and breed standard quality

Final Thoughts

Embark DNA panels are powerful tools for breeders when they are interpreted correctly. Understanding how to read these results allows breeders to make more informed decisions and communicate clearly about genetics within the breeding community.