As a veterinarian, I have a deep respect for the Norwegian Lundehund. It is one of the rarest and most genetically unusual dog breeds in the world, with six toes on each foot, extraordinary joint flexibility, and a history of climbing sea cliffs to hunt puffins. That ancient, isolated heritage gave the breed its charm, but it also left it with a narrow gene pool and some significant health vulnerabilities that every owner needs to understand before and during ownership.
The headline concern is what is informally called Lundehund syndrome, a set of digestive disorders that can quietly undermine a dog’s health by preventing proper nutrient absorption. There are other issues worth knowing too, including certain joint and eye conditions. None of this should scare you away from the breed, but it does mean a Lundehund owner has to be proactive, observant, and closely partnered with a vet. In this guide I will explain what these problems are, the symptoms to watch for, what causes them, how they are treated, and how to support your dog at home.
What Is Norwegian Lundehund Health Problems in Dogs?
The phrase covers a handful of conditions the breed is predisposed to, with the digestive disorders being by far the most important.
The central health problem in this breed is a group of gut disorders often called Lundehund syndrome. These commonly include intestinal lymphangiectasia (abnormal, leaking lymph vessels in the gut wall) and protein-losing enteropathy (loss of protein through the intestine). Together they mean the dog can eat well yet still fail to get enough nutrition from food. Beyond the gut, the breed can also be affected by joint and eye conditions. Because these problems are largely genetic, awareness and early monitoring are the most powerful tools an owner has.
Symptoms to Watch For
Digestive disease in this breed can develop gradually, so subtle early signs matter. Learn what to look for and act early rather than waiting.
If you notice any of these, especially in combination, see your vet promptly. These signs can point to active digestive disease that needs diagnosis through bloodwork and sometimes imaging.
What Causes It
The breed’s health problems are driven largely by genetics and its very limited founding population, but several distinct conditions are involved.
Digestive disorders
- Intestinal lymphangiectasia
- Protein-losing enteropathy
- Chronic intestinal inflammation
- Impaired nutrient absorption
Genetic factors
- Very small founding gene pool
- Inherited predisposition to gut disease
- Limited genetic diversity from past population bottlenecks
Other predispositions
- Certain joint and mobility issues
- Eye conditions in some lines
- Stress and dietary triggers that can worsen gut symptoms
Because so much of this is inherited, responsible breeding and screening matter enormously. If you are getting a puppy, ask the breeder detailed questions about the health and digestive history of the parents and grandparents.
Treatment and Recovery
There is no cure for the breed’s digestive syndrome, but many dogs are managed successfully. Treatment is always individual and directed by your vet.
Get an accurate diagnosis
Your vet will use bloodwork, faecal tests, and sometimes ultrasound or biopsy to confirm what is happening in the gut. Accurate diagnosis guides everything that follows.
Start a tailored diet
Affected dogs often need a highly digestible, sometimes low-fat or prescription diet to reduce protein loss and ease the gut. This is chosen by your vet, not by trial and error at home.
Use medication as prescribed
Anti-inflammatory medication and supportive treatments are sometimes needed to control intestinal inflammation. Follow dosing exactly and never stop medication suddenly without advice.
Monitor protein and weight regularly
Repeat bloodwork and routine weigh-ins let your vet track whether the plan is working and adjust it over time. Stable protein levels are a key goal.
Maintain consistency long term
Many dogs do well for years with a steady diet, medication, and monitoring. Recovery here means ongoing management and a good quality of life, not a one-time fix.
Prevention and Home Care
You cannot change a dog’s genetics, but thoughtful care meaningfully improves outcomes and helps you catch problems early.
- Choose a responsible breeder who screens parents for health and digestive issues
- Schedule regular veterinary checkups, including periodic bloodwork as your vet advises
- Feed a consistent, vet-approved diet and avoid sudden food changes
- Keep treats and table scraps to a minimum to protect a sensitive gut
- Weigh your dog regularly and keep a simple stool and appetite diary
- Watch for early signs of digestive trouble and act quickly
- Maintain a calm, low-stress routine, since stress can aggravate gut symptoms
- Keep up with parasite prevention and dental care as part of overall health
With attentive ownership and a strong relationship with your vet, many Norwegian Lundehunds live full, happy lives. The key is to respect the breed’s known vulnerabilities and to treat early monitoring as a normal part of care rather than an afterthought.
Safety note: Norwegian Lundehunds are prone to serious digestive disease, so any signs of chronic diarrhoea, weight loss, or a swollen belly warrant prompt veterinary attention rather than home treatment.
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What you need to know
The Norwegian Lundehund is a rare breed with a unique digestive disorder called Lundehund syndrome, a group of intestinal conditions that affect nutrient absorption and can be serious. Many dogs in the breed are affected to some degree, showing weight loss, swelling, or chronic digestive upset, so a vet experienced with the breed is invaluable for managing diet and symptoms.
The breed also has extra toes and very flexible joints, traits that helped it climb cliffs but can affect movement. Because the gene pool is tiny, careful breeding and monitoring matter. Watch closely for changes in appetite, weight, stool, or energy, as these can signal the digestive syndrome flaring. Early veterinary involvement and a tailored diet give affected dogs the best quality of life.