Pitbull Puppy Color Calculator
Predict American Pitbull Terrier and Staffordshire Terrier puppy coat colors — from blue and fawn to brindle and merle — with merle health warnings.
What Is the Pitbull Puppy Color Calculator?
Predict American Pitbull Terrier and Staffordshire Terrier puppy coat colors — from blue and fawn to brindle and merle — with merle health warnings.
Pitbull-type dogs come in an enormous range of coat colours — from solid red, fawn, and black to brindle, blue, chocolate, and the controversial merle. Colour genetics in Pitbull-type dogs follows the same Mendelian principles as other breeds, with the added complexity of the merle gene — which is not a historically native colour to the American Pitbull Terrier and has been introduced through crossbreeding, raising health and breeding ethics concerns.
Every result is based on published veterinary research and breed-size-specific growth data — not generic averages. This tool is completely free, works instantly in your browser, and requires no account or sign-up.
How to Use This Calculator
Fill in the required fields above — typically your dog's weight, age, or breed size. Every field has a clear label and hint.
Press the calculate button to get your instant result. No page reload, no account needed, no waiting.
Your result appears immediately below the calculator. It includes the primary answer plus additional context where relevant.
Share, print, or save your result. Always discuss health-related results with your veterinarian before making decisions.
How It Works
Pitbull coat colour involves the standard canine loci. The A locus controls sable/fawn vs. brindle pattern interaction. The K locus (kbr allele) determines brindle expression. The B locus determines black vs. chocolate/red. The D locus determines dilution — blue (dilute black) and champagne (dilute red) are created by the dd genotype. The E locus controls yellow/red expression. The M locus controls merle — historically absent in American Pitbull Terriers.
Sources: Schmutz SM, Berryere TG. Animal Genetics 2007; Dreger DL, Schmutz SM. J Hered 2011; Clark LA et al. PNAS 2006.
Veterinary Research
Every formula is derived from peer-reviewed veterinary studies and clinical guidelines, not guesswork or generic rules.
Instant Results
No page reload, no waiting, no account needed. Enter your details and your result appears immediately.
100% Private
All calculations happen in your browser. Nothing you enter is ever stored on our servers or shared with anyone.
Always Free
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Frequently Asked Questions
Sources & References
This calculator's formulas are based on the following peer-reviewed and authoritative veterinary sources:
- Merck Veterinary Manual u2014 Genetics — Canine coat colour genetics and hereditary traits
- Kennel Club Breed Standards — Recognised breed standards and genetic characteristics
⚠️ These calculators are reference tools only. Always consult a licensed veterinarian before administering medication or making medical decisions.