Norwegian Lundehund: At a Glance
The Norwegian Lundehund is a biological marvel — 6 toes, flexible spine, and ears that close. Built for puffin hunting on vertical cliffs.
Lundehund Unique Adaptations
Lundehund Trait
| Lundehund Trait | Description | Purpose | Modern Implication |
|---|---|---|---|
| Polydactyly (6 Toes) | 6 fully formed toes on each foot (not dewclaws) | Grip on vertical cliff faces while hunting puffins | Excellent climber — needs secure, tall fencing |
| Flexible Spine | Spine can bend backward to touch head to back | Navigate narrow cliff crevices | Prone to Lundehund Syndrome (GI disease) |
| Flexible Neck | Neck can bend 180° backward | Reach into deep puffin nesting burrows | Normal — not a medical concern |
| Ears That Close | Ears fold shut to protect canal | Keep out debris and water in cliff burrows | Normal — ears may close when dog is relaxed |
| Flexible Shoulders | Front legs can extend 90° outward | 'Sploot' position for stability on cliffs | Normal — may look unusual but is comfortable |
Is a Norwegian Lundehund Right for You?
| Experienced dog owner — Lundehunds are primitive, independent thinkers | |
| Has secure, tall fencing — these dogs are escape artists and climbers | |
| Prepared for potential health issues — Lundehund Syndrome affects 50%+ of the breed | |
| Wants a rare, unique dog with fascinating history | |
| Committed to positive training — sensitive dogs, harsh methods backfire | |
| Looking for an off-leash hiking dog (high prey drive, escape artist) | |
| Unprepared for potential chronic GI disease (Lundehund Syndrome) | |
| Wants a dog that's easy to find (very rare — may wait years for a puppy) |
Lundehund Syndrome (protein-losing enteropathy) is a serious GI disease affecting 50%+ of the breed. It causes chronic diarrhea, weight loss, and protein loss. Responsible breeders screen for it, but there is no cure — only management. Know this risk before committing to the breed.
Lundehunds are escape artists. Their 6-toed feet, flexible spine, and climbing ability mean they can scale fences that contain other dogs. A 6-foot wooden privacy fence is the minimum. Check for gaps, loose boards, and dig-proof the perimeter. These dogs were bred to navigate cliffs — your fence is not a challenge to them.
The Norwegian Lundehund (LOON-de-hund) is a Spitz-type breed from the rocky Norwegian coast, historically used to hunt puffins (Lunde = puffin in Norwegian) from narrow sea cliff crevices. It holds the distinction of having more toes than any other domestic dog: six fully functional toes on each foot (most dogs have four functional toes plus a dewclaw). It can also fold its ears shut, bend its head to touch its spine, and splay its front legs 90 degrees to the side -- adaptations for navigating cliff cavities. The breed nearly went extinct twice in the 20th century and still numbers only a few thousand worldwide.
Physical Anatomy
Polydactyly is fixed in the Lundehund standard: six toes per foot is required for breed recognition, not a fault. The extra toe aids grip on vertical rock surfaces. The flexible spine allows the dog to lie flat or bend its head fully backward. Ear canals can be folded closed to prevent water or debris ingress. These traits were selectively maintained for hundreds of years because they directly aided puffin hunting -- a niche now obsolete but the traits remain. Weight: 13--20 lbs; height: 12--15 inches.
Temperament
Lundehunds are loyal to family but reserved with strangers -- a natural wariness that served solo cliff-working dogs well. They are curious and playful but independent. Recall can be unreliable without consistent training; a secure fenced yard is important. They are vocal (alert barking) and can be stubborn. Early socialization reduces wariness toward novel people and environments.
Lundehund Syndrome: The Critical Health Issue
Lundehund Syndrome (LGS -- Lundehund Gastroenteropathy Syndrome) is a protein-losing enteropathy affecting an estimated 70--100% of Lundehunds to varying degrees over their lifetime. The intestinal villi are abnormally shallow and fail to absorb nutrients efficiently. Severe cases develop hypoalbuminemia (low blood protein), peripheral edema (fluid accumulation in limbs and abdomen), and profound weight loss. There is no cure; management involves highly digestible, low-fat, high-protein diets, vitamin B12 supplementation (cobalamin injections when malabsorption is severe), and sometimes immunosuppressants. Any Lundehund losing weight, developing diarrhea, or showing edema needs veterinary evaluation for LGS. Most Lundehunds with managed LGS live normal lifespans (12--14 years) -- unmanaged LGS is fatal. Every Lundehund owner must understand this condition before acquiring the breed.
Diet and Management
Easily digestible, moderate-fat, high-protein diet. Many owners use cooked chicken and rice, commercial hydrolyzed protein diets, or novel protein sources. Avoid high-fat foods -- fat malabsorption worsens symptoms. Regular bloodwork (albumin, B12, folate, complete blood count) every 6--12 months helps catch LGS progression. Small, frequent meals are better tolerated than one large meal.
Sources: AKC Norwegian Lundehund breed standard; peer-reviewed LGS research (Journal of Veterinary Internal Medicine -- Berghoff et al.); Norwegian Lundehund Association health data; Merck Veterinary Manual -- protein-losing enteropathy management.