Top 10 Most Harmful Dog Breed Standards by Kennel Club
Dog breed standards—the official “blueprints” for how purebred dogs should look—have helped preserve dog breeds for generations. Kennel clubs like the AKC and UKC do important work promoting responsible breeding and dog shows. But in some cases, the push for a very specific appearance has accidentally led to serious health problems. Flat-faced Pugs struggling to breathe, Dachshunds with back issues, and Bulldogs needing C-sections just to give birth—these aren’t just random problems. They’re often the direct result of breed standards that prioritize looks over function.
The good news? Many experts and even some kennel clubs are now rethinking these rules to keep dogs healthier while still preserving what makes each breed special. Below, we’ve grouped the most affected breeds by the type of harm they face—respiratory, spinal, or skin/eye issues—so you can see the patterns clearly.
The Breathing Breeds: When “Flat Face” Means “Can’t Breathe”
These brachycephalic (short-nosed) breeds are beloved for their wrinkled, smush-faced expressions. But those same features cause daily suffering.
1. English Bulldog
Kennel Clubs: AKC, KC (UK), FCI
AKC Standard: “Bulldog Breed Standard”
FCI Standard: No. 149 (Group 2)
Harmful Traits in Standards:
- AKC: “The skull should be very large… the face extremely short, muzzle very broad, blunt and inclined upwards.”
- FCI: “Muzzle extremely short, broad, turned upwards.”
Health Impacts:
- 100% require C-sections (Packer et al. 2015)
- 90% suffer BOAS (O’Neill et al. 2019)
- Avg. lifespan: 6-8 years (RVC 2021)
What this means for owners: An English Bulldog’s signature “smushed” face is a medical emergency waiting to happen. Most cannot breathe normally, play for more than a few minutes, or deliver puppies without surgery.
Reform Demands:
- WSAVA: “Require muzzle length ≥1/3 of skull length” (2022 Brachycephalic Guidelines)
2. Pug
Kennel Clubs: AKC, KC, FCI
AKC Standard: “Pug Breed Standard”
FCI Standard: No. 253 (Group 9)
Harmful Traits:
- AKC: “Muzzle short, blunt… tail curled as tightly as possible over hip.”
- FCI: “Tail tightly curled over hip. Double curl preferred.”
Health Impacts:
- 65% spinal deformities (Brown et al. 2017)
- 50% corneal ulcers (O’Neill et al. 2022)
What this means for owners: The “tightly curled” tail prized in show rings is often attached to deformed vertebrae. Meanwhile, those large, beautiful eyes are prone to painful ulcers because they cannot fully close over the flat face.
Reform Demands:
- FECAVA: “Ban tail curls and require nostril width ≥3mm” (2023)
6. French Bulldog
Kennel Clubs: AKC, KC
AKC Standard: “French Bulldog Breed Standard”
Harmful Traits:
- AKC: “Head large and square… nose extremely short.”
Health Impacts:
- 60% require airway surgery (Liu et al. 2017)
What this means for owners: More than half of French Bulldogs need surgical intervention just to breathe comfortably. This is not a breed quirk—it is a standard that prioritizes aesthetics over air.
Reform Demands:
- French Bulldog Health Council: “Nostril width ≥3mm” (2023)
The Spinal & Joint Breeds: When Posture Causes Pain
These breeds suffer because extreme angles, sloping backs, and short legs have been exaggerated beyond healthy limits.
3. German Shepherd (Show Line)
Kennel Clubs: AKC, KC
AKC Standard: “German Shepherd Dog Breed Standard”
Harmful Traits:
- AKC: “Topline slopes downward from withers to croup… hindquarters strongly angulated.”
Health Impacts:
- 80% hip dysplasia (Marschall & Distl 2007)
- 40% degenerative myelopathy (Awano et al. 2009)
What this means for owners: The dramatic sloping back seen in show-ring German Shepherds is not natural—it is a breeding choice that cripples dogs. Working-line German Shepherds, with straighter backs, have far fewer joint problems.
Reform Demands:
- GSD Health Foundation: “Adopt working-line topline standards” (2023)
4. Dachshund
Kennel Clubs: AKC, FCI, KC
AKC Standard: “Dachshund Breed Standard”
FCI Standard: No. 148 (Group 4)
Harmful Traits:
- FCI: *”Distance from ground to chest less than 1/3 of height at withers.”*
Health Impacts:
- 25% IVDD risk (Bergknut et al. 2012)
What this means for owners: One in four Dachshunds will suffer a painful spinal disc rupture. The breed’s iconic “low-slung” body is directly linked to this heartbreaking statistic.
Reform Demands:
- IVDD Consortium: “Minimum leg length = 1/3 body height” (2021)
9. Scottish Terrier
Kennel Clubs: AKC, KC
AKC Standard: “Scottish Terrier Breed Standard”
Harmful Traits:
- AKC: “Body short-coupled… legs very heavy.”
Health Impacts:
- 40% IVDD rate (Brisson et al. 2004)
What this means for owners: Like Dachshunds, Scottish Terriers pay a price for their short-legged, long-bodied shape. Nearly half will experience debilitating back issues.
Reform Demands:
- STCA Health Committee: “Leg length ≥1/3 body length” (2021)
The Skin, Eye & Neurological Breeds: When Wrinkles and Droop Cause Disease
These breeds suffer from infections, pain, and neurological damage because their extreme features trap moisture, block vision, or compress the brain.
5. Cavalier King Charles Spaniel
Kennel Clubs: AKC, FCI, KC
AKC Standard: “Cavalier King Charles Spaniel Breed Standard”
FCI Standard: No. 136 (Group 9)
Harmful Traits:
- AKC: “Skull slightly rounded… full, lustrous coat.”
Health Impacts:
- 70% syringomyelia (Rusbridge et al. 2006)
What this means for owners: Syringomyelia is a painful condition where the brain is too large for the skull, causing fluid-filled cavities in the spinal cord. This is not rare—it affects seven out of ten Cavaliers.
Reform Demands:
- CKCS Club: “Mandatory MRI screening for breeding” (2022)
7. Bloodhound
Kennel Clubs: AKC, KC
AKC Standard: “Bloodhound Breed Standard”
Harmful Traits:
- AKC: “Eyelids diamond-shaped… excessive dewlap.”
Health Impacts:
- 100% eyelid surgery risk (Gelatt & MacKay 2005)
What this means for owners: Every single Bloodhound with standard-conforming droopy “diamond-shaped” eyelids will eventually need surgery. These heavy, sagging lids trap debris and cause chronic irritation.
Reform Demands:
- ACVO: “Limit eyelid droop to 2mm” (2020)
8. Neapolitan Mastiff
Kennel Clubs: AKC, FCI
FCI Standard: No. 197 (Group 2)
Harmful Traits:
- FCI: “Abundant, loose skin forming wrinkles.”
Health Impacts:
- 90% skin infections (Hill et al. 2015)
What this means for owners: Those majestic wrinkles are a breeding ground for yeast and bacteria. Most Neapolitan Mastiffs suffer chronic skin fold dermatitis requiring constant medication.
Reform Demands:
- Italian Mastiff Club: “Max 3 facial folds” (2022)
10. Shar-Pei
Kennel Clubs: AKC, FCI, KC
AKC Standard: “Chinese Shar-Pei Breed Standard”
Harmful Traits:
- AKC: “Excessive wrinkles in puppies.”
Health Impacts:
- 80% skin infections (Olsson et al. 2011)
- CSPCA: “Wrinkles must recede by adulthood” (2023)
What this means for owners: The wrinkles that win championships also trap moisture, leading to recurrent skin infections. Responsible breeders now aim for moderate wrinkles that recede with age.
Reform Demands:
Breed Standards Comparison Table
FAQ’s – Canine Health vs. Aesthetics
Which dog breeds have the most health problems due to breed standards?
Short-nosed breeds (Bulldogs, Pugs, French Bulldogs) often struggle to breathe, while Dachshunds frequently get back problems, and Cavalier King Charles Spaniels are prone to painful brain conditions.
Are English Bulldogs suffering because of breed standards?
Yes. The AKC’s requirement for an “extremely short muzzle” means 100% of English Bulldogs require C-sections and 90% suffer from brachycephalic airway syndrome. Healthier alternatives like the Continental Bulldog have longer snouts and natural births.
What are the new kennel club health requirements for flat-faced dogs?
Slowly, yes. The AKC, KC, and FCI now allow health-focused revisions including longer muzzles, less extreme angulation in German Shepherds, and mandatory MRI screening for Cavalier King Charles Spaniels before breeding.
What is the healthiest version of a Dachshund to avoid back problems?
Dachshunds with longer legs and shorter backs have a much lower risk of IVDD (intervertebral disc disease). The IVDD Consortium recommends a minimum leg length of 1/3 of body height. Look for breeders who follow health-based conformation standards rather than extreme “low-slung” show ring preferences.
When Breed Standards Cause Suffering-Final Thoughts
At the end of the day, nobody wants their favorite dog breeds to disappear—we just want them to be healthier. Kennel clubs have done a lot of good over the years, but it’s time to update some of those old standards to match what we now know about dog health. The best part? We don’t have to choose between “cute” and “healthy.” Breeds like the Continental Bulldog (a Bulldog with a longer snout and fewer breathing problems) prove that we can have both. By supporting responsible breeders who prioritize health and pushing for smarter breed standards, we can make sure future generations of dogs live longer, happier lives—without losing what makes them so lovable in the first place!
