French Bulldog With Long Tail: Are They Born That Way? (2026)

Is a French Bulldog with long tail normal? Not for a purebred dog. Purebred French Bulldogs are born with naturally short tails, either straight or screwed, and they are not docked. When a Frenchie has a long tail, the most likely explanation is another breed somewhere in its family tree, or a deliberate outcross. It isn’t a sign that anything is wrong with the dog.

If you’ve just brought home a puppy whose tail keeps growing, or you’ve seen “rare long-tail Frenchie” ads, this guide explains the genetics in plain English, what the breed standard says, what a long tail means for health, and the questions to ask before you buy.

Are French Bulldogs Born With Long Tails?

No. Purebred French Bulldogs are born with short tails, and the reason is in their DNA. In a 2019 study published in PLOS Genetics, researchers at UC Davis found a variant in a gene called DVL2 in all 79 French Bulldogs they genotyped. The same variant was fixed in Bulldogs and very common in Boston Terriers, the other “screw tail” breeds.

The researchers found that dogs carrying two copies of this variant had malformed tail vertebrae in every case, which is what produces the short, kinked or corkscrew tail. Pugs, which don’t carry the variant, have full-length tails without those malformations. So when people ask, “are French Bulldogs born with long tails?”, the genetic answer for a purebred dog is no.

Are French Bulldog tails docked?

No. A French Bulldog’s short tail is natural, not cut. Docking isn’t part of the breed, and the American Veterinary Medical Association states that it opposes tail docking of dogs when done solely for cosmetic purposes. If a seller tells you a Frenchie was “docked to look correct,” that’s a red flag worth questioning.

Why Does My French Bulldog Have a Long Tail?

If you own a French Bulldog with long tail, there are a few likely explanations. None of them makes your dog any less lovable, but they can tell you something about its background.

• Another breed in the family tree: because the short-tail variant was found in every purebred Frenchie tested, a dog with a full tail most likely inherited a normal copy of the gene from a non-Frenchie ancestor, even several generations back.
• A deliberate outcross: some health-focused breeding projects introduce other breeds on purpose. A Finnish project backed by the Finnish Kennel Club, for example, planned to select partner breeds free of the DVL2 variant to reduce health problems linked to the breed’s extreme shape.
• A mislabeled mix: some puppies sold as Frenchies are French Bulldog mixes or Boston Terrier crosses.

Don’t rely on the tail alone. Some mixed dogs still have short tails, so a short tail doesn’t prove a dog is purebred either.

How to tell if a long-tailed Frenchie is purebred

1. Ask the breeder for registration papers and a pedigree for both parents.
2. Request photos or a meeting with both parents, and look at their tails.
3. Consider a canine breed-identification DNA test if you’re curious.
4. Ask your vet to check the spine and tail area at the first visit.

French Bulldog With Long Tail and the Breed Standard

The American Kennel Club’s official standard describes the French Bulldog tail as “either straight or screwed (but not curly), short, hung low”, with a thick root and fine tip. A long tail isn’t listed among the standard’s disqualifications, but it doesn’t match the description, so a French Bulldog with long tail would be marked down in the show ring.

For a family pet, none of this matters much. Show standards describe an ideal look; they don’t measure how good a companion your dog will be. The same standard also sets an upper weight limit of 28 pounds and lists colors such as merle as disqualifying, which is worth knowing if you’re comparing prices in our guide to the cost of a merle French Bulldog.

Is a French Bulldog With Long Tail Healthier?

Maybe in one small way, but don’t count on it. The genetics behind the screw tail also affect the spine. In a 2017 study in The Veterinary Journal, researchers found hemivertebrae in 93.5% of neurologically normal French Bulldogs scanned with CT. Hemivertebrae are wedge-shaped, malformed vertebrae.

That sounds alarming, but most affected dogs never show symptoms. Veterinarian Patty Khuly, VMD, notes that most dogs are never adversely affected by the defect. When it does cause trouble, it’s because the spinal cord is compressed.

A long tail can mean fewer malformed tail bones, and it removes the deep skin pocket that some screw tails form. But a French Bulldog with long tail can still have malformed vertebrae farther up the spine, plus the breathing, skin and eye issues common to flat-faced breeds. Health depends on the whole dog, not just the tail.

Screw tail problems to know about

A tight screw tail can sit in a skin fold that traps moisture and debris. Surgeon Michael Pavletic, DVM, of MSPCA-Angell describes this tail fold intertrigo, a skin infection that shows up as scooting, a bad smell at the tail base or stool caught under the tail. He notes it’s seen less often in French Bulldogs than in English Bulldogs.

Caring for a French Bulldog With Long Tail

Day-to-day care for a French Bulldog with long tail is the same as for any Frenchie. The tail itself usually needs less attention than a screw tail, since there’s no deep pocket to clean.

• Tail check: look under the tail during weekly grooming for redness, sores or stuck debris.
• Weight: keep your dog lean. The AKC standard sets 28 pounds as the upper limit, and extra weight strains the back and breathing.
• Heat: flat-faced dogs overheat easily, so walk early or late on hot days and give shade and water.
• Coat: a weekly brush keeps the short coat tidy; our guide to how much French Bulldogs shed covers seasonal changes.
• Vet visits: yearly checkups help catch spine, skin and airway problems early.

Buying a French Bulldog With Long Tail: Red Flags

Some sellers advertise a French Bulldog with long tail as “rare” and charge extra for it. A long tail isn’t a rare purebred trait; it’s a sign of mixed or outcrossed ancestry. That’s fine if the seller is honest about it, but you shouldn’t pay a premium for a feature the breed standard doesn’t describe.

French Bulldog With Long Tail FAQs

Is a French Bulldog with long tail purebred?

Probably not. A 2019 study found the short-tail gene variant in every French Bulldog tested, so a full tail usually means another breed in the family tree. Papers, a pedigree or a DNA test can confirm.

Do French Bulldog puppies’ tails grow longer?

A tail grows in proportion as the puppy grows, but a purebred Frenchie’s tail stays short. If a puppy’s tail is already noticeably long, it will likely stay long as an adult.

Are French Bulldogs born without tails?

Most have a short tail rather than none at all. Some tails are so short or tightly screwed that they’re barely visible, which is why people think the dogs are tailless.

Can a long-tailed Frenchie be shown at AKC shows?

A long tail isn’t a listed disqualification, but the AKC standard calls for a short tail, so the dog would be judged down. It can still take part in many other AKC sports and activities.

Is a long tail painful for a French Bulldog?

No. A long tail is a normal dog tail. Watch for the same warning signs as any dog, such as pain when touched, limping or changes in tail carriage, and ask your vet if you notice them.

Should I dock my French Bulldog’s long tail?

No. Docking a healthy tail for looks isn’t recommended, and the AVMA opposes cosmetic tail docking. Tail surgery is only done for medical reasons, such as a severe tail-fold infection.

Final Verdict: Is a French Bulldog With Long Tail a Problem?

A French Bulldog with long tail isn’t a health problem, but it isn’t a purebred trait either. Purebred Frenchies are born with short, straight or screw tails, never docked, because of a gene variant shared across the breed. A long tail usually means mixed or outcrossed ancestry. Love the dog, skip any “rare” price premium, and keep up regular vet checks.

Sources

• American Kennel Club, Official Standard of the French Bulldog (accessed October 2026)
• Mansour et al., PLOS Genetics (2019), DVL2 frameshift mutation in screw tail breeds (accessed October 2026)
• UC Davis, Bulldogs’ Screw Tails Linked to Human Genetic Disease (accessed October 2026)
• Ryan et al., The Veterinary Journal (2017), Thoracic vertebral malformations in French Bulldogs, Pugs and English Bulldogs (accessed October 2026)
• AVMA, Opposition to Cosmetic Ear Cropping and Tail Docking (accessed October 2026)
• MSPCA-Angell, Tail Fold Intertrigo (Screw Tail), Michael M. Pavletic, DVM (accessed October 2026)
• Embrace Pet Insurance, Hemivertebrae, Patty Khuly, VMD (accessed October 2026)
• French Bulldog Finnish Crossbreeding Project (Finnish Kennel Club partner project) (accessed October 2026)