Norwegian Lundehund Care Guide — Six Toes and a Sensitive Gut

The Norwegian Lundehund is one of the rarest and most anatomically unusual dog breeds on the planet. Originally bred to hunt puffins (lunde in Norwegian) on the steep, narrow cliffs of northern Norway, the Lundehund developed physical traits found in no other breed: six functional toes on each foot, extreme joint flexibility that allows the front legs to extend straight out to the sides, and the ability to tilt the head backward until it touches the spine. These adaptations made it the perfect cliff-climbing bird hunter. But the breed also carries a serious genetic condition — Lundehund syndrome — that makes nutrition not just important but potentially life-saving.

Lundehund Syndrome: The Defining Health Challenge

Lundehund syndrome is an umbrella term for a group of gastrointestinal disorders that affect the breed at an unusually high rate. The condition encompasses intestinal lymphangiectasia, protein-losing enteropathy (PLE), and inflammatory bowel disease (IBD). Estimates suggest that a significant majority of Lundehunds will develop some degree of intestinal disease during their lifetime, though severity varies enormously — from subclinical (no visible symptoms) to severe and life-threatening.

Dietary Management of Intestinal Disease

For Lundehunds with diagnosed intestinal disease, diet is the primary management tool — often more impactful than medication alone. The dietary strategy focuses on reducing the workload on the compromised intestinal lymphatic system while ensuring adequate protein intake to replace what is being lost.

Low-Fat, High-Quality Protein

The cornerstone of Lundehund syndrome management is a low-fat diet. Dietary fat is absorbed through the intestinal lymphatic system — the very system that is compromised in lymphangiectasia. High-fat meals overwhelm the damaged lymph vessels, worsening protein loss and diarrhea.

• Target fat content: 8–12% on a dry matter basis for dogs with active disease. Healthy Lundehunds without symptoms may tolerate 12–15%
• MCT oil as a fat source: Medium-chain triglycerides are absorbed directly into the bloodstream rather than through the lymphatic system, making them the preferred fat source for Lundehunds with lymphangiectasia. Coconut oil is a natural MCT source
• Protein: 25–30% from highly digestible sources — white fish, lean chicken breast, egg whites, and cottage cheese are commonly recommended. The goal is to replace the protein being lost while keeping fat to a minimum
• Avoid fatty meats: Lamb, duck, and pork are higher in fat and harder for the compromised gut to process. Lean proteins only

Small, Frequent Meals

Rather than the standard two meals per day, Lundehunds with intestinal disease often do better with 3–4 smaller meals. This reduces the volume of fat and protein the lymphatic system must process at any one time, minimizing lymph vessel overload. Even healthy Lundehunds may benefit from three daily meals given the breed's predisposition.

Supplements for Intestinal Support

• Probiotics: Support beneficial gut bacteria and may reduce intestinal inflammation. Choose a veterinary-grade probiotic with documented strains
• Vitamin B12 (cobalamin): Frequently deficient in dogs with intestinal malabsorption. May require injectable supplementation if oral absorption is impaired
• Folate: Also commonly depleted by intestinal disease. Monitor levels through blood work
• Fat-soluble vitamins (A, D, E, K): Malabsorption of fat means malabsorption of fat-soluble vitamins. Supplementation may be necessary, guided by blood tests

The Six-Toed Anatomy: Paw and Joint Care

The Lundehund's six toes per foot are not vestigial — all six are fully formed and functional, connected by an additional set of muscles and tendons. This polydactyly gave the breed extra grip on slippery cliff faces. In modern life, it means extra attention to paw care:

• Nail trimming: Six toes means six nails per foot (some dogs may have additional dewclaws as well). Check and trim every 2 weeks. The extra toes often do not contact the ground during normal walking, so their nails will not wear down naturally
• Paw inspections: The additional toes create more skin folds between pads where debris, moisture, and bacteria can accumulate. Inspect between all toes weekly, especially after walks in wet or muddy conditions
• Traction on smooth surfaces: Paradoxically, the extra toes that provide superior grip on rocky terrain can make Lundehunds less stable on smooth indoor floors. Area rugs on hardwood or tile help prevent slipping

Extreme Joint Flexibility

The Lundehund can extend its front legs straight out to the sides (perpendicular to the body) and bend its head backward to touch its spine — a level of flexibility found in no other dog breed. While this hypermobility is normal for the breed, it means that standard orthopedic assessments must be interpreted differently. What would be a dislocated shoulder in any other breed is simply Tuesday for a Lundehund.

This flexibility does not typically cause problems, but it means that joint injuries may be harder to detect because the normal range of motion is so extreme. If your Lundehund shows sudden lameness or reluctance to use a limb, veterinary examination is important even though the joint may appear to have normal range of motion.

Exercise for a Moderate-Energy Rare Breed

Despite their dramatic physical capabilities, Lundehunds are a moderate-energy breed in daily life. They are alert, curious, and playful but not hyperactive. Most adults do well with 30–45 minutes of daily exercise:

• Moderate walks: 20–30 minutes, ideally on varied terrain that lets them use their unique feet
• Climbing and exploration: If you have safe, rocky terrain or agility equipment, Lundehunds naturally enjoy climbing. Their cliff-hunting instincts remain strong
• Mental stimulation: Puzzle feeders, scent games, and hide-and-seek with treats. Lundehunds are intelligent and independent — they need mental engagement as much as physical exercise
• Gentle play: Tug, fetch, and interactive toys. Avoid high-impact activities like sustained running on hard surfaces, which can stress the flexible joints

For Lundehunds with active intestinal disease, moderate exercise after meals may actually aid digestion and intestinal motility, but avoid vigorous activity within an hour of eating.

Feeding the Healthy Lundehund

Even Lundehunds without diagnosed intestinal disease benefit from a proactive dietary approach given the breed's predisposition. Think of it as preventive management rather than treatment:

• Moderate fat content: 12–15% is a sensible range for healthy adults. Avoid high-fat premium foods designed for working breeds
• Highly digestible protein: Fish, lean poultry, and eggs are excellent choices. The easier the protein is to absorb, the less strain on the intestinal system
• Calories: 400–700/day for a moderately active 6–9 kg adult. Lundehunds are small dogs — overfeeding even slightly has a proportionally large impact
• Avoid abrupt diet changes: The Lundehund gut is sensitive. Any food transitions should be done gradually over 10–14 days (longer than the typical 7-day recommendation for other breeds)
• Fiber: Moderate soluble fiber (pumpkin, oat fiber) supports gut health and stool quality without adding fat