Newfoundland Health Problems: A Breed Health Guide

Yes, Newfoundlands have a recognised set of health problems, and the list is the one you would expect from a giant, deep chested, heavily coated working dog: hip and elbow dysplasia, heart disease (above all subaortic stenosis), gastric dilatation and volvulus, cystinuria, eyelid and eyelash abnormalities, skin and ear trouble under a dense double coat, and poor heat tolerance. If your Newfoundland is retching without bringing anything up, has a swollen or hard belly, has fainted or collapsed, is breathing with visible effort, or is straining to urinate without producing urine, stop reading and call your veterinarian or an emergency clinic now.

Predisposition is not prediction. A breed list tells you where to point your attention and which screening exams to ask about, not what your dog will develop. Results vary from dog to dog, and plenty of Newfoundlands move through life with nothing more than wellness exams and the usual care a giant breed needs. What follows is a plain walk through the conditions worth knowing, the early signs that should prompt a call, and the ones that mean you drive to an emergency clinic instead.

The heart: subaortic stenosis and other cardiac concerns

Subaortic stenosis is the cardiac condition most associated with this breed. It is a congenital narrowing just below the aortic valve, where a ridge or ring of fibrous tissue partially obstructs blood leaving the left side of the heart. The ventricle has to generate higher pressure to push blood past the narrowing, and over time that extra work thickens the heart muscle and can disturb the heart's rhythm.

It is usually picked up as a heart murmur during a puppy or wellness exam. A murmur is a sound, not a diagnosis, so the next step is referral for an echocardiogram, where a cardiologist can see the obstruction, measure how fast blood is moving through it, and grade how significant it is. Mild cases and severe cases are managed very differently, which is exactly why the measurement matters.

Signs that should move a Newfoundland up the queue for a cardiac workup include tiring far sooner than usual on familiar walks, weakness or wobbling after exertion, fainting or near fainting episodes, coughing, and breathing that looks laboured at rest. Dilated cardiomyopathy and rhythm disturbances are also recognised in giant breeds and can produce overlapping signs. None of these are things to watch and wait on. Talk to your veterinarian about whether a cardiac exam, chest imaging, an ECG or a referral echocardiogram belongs in your dog's plan.

Hips, elbows and giant breed joint development

Hip dysplasia and elbow dysplasia are developmental, which means they begin while a Newfoundland is still growing. In the hip, the ball and socket fit loosely and the joint moves in ways it was not built to move; that laxity drives abnormal wear and, over time, arthritis. In the elbow, the problem is usually a mismatch in how the three bones of the joint grow together, sometimes with a fragment of bone or cartilage that never fuses properly.

Genetics set the stage, but growth rate, body condition and exercise load all influence how the joints develop. This is one of the few areas where owner decisions genuinely matter, and it is worth asking your veterinarian specifically about growth management, body condition scoring and what kind of exercise suits a heavy puppy whose growth plates are still open.

What you might notice: a bunny hopping gait where both hind legs move together, stiffness when getting up after rest that loosens with movement, reluctance to take stairs or jump into the car, a swaying or narrow hind end, limping on a front leg that shifts from side to side, or hind end muscle that looks thinner than it should.

Giant breeds are also seen with cranial cruciate ligament injury, osteochondritis dissecans in the shoulder or hock, and panosteitis, a growing pain condition that causes shifting lameness in young dogs. Because these look similar from across the room, a lameness exam and radiographs are how the question gets settled. Breed club screening schemes for hips and elbows exist precisely because the joints can be assessed before problems become obvious.

Bloat: the abdominal emergency giant breeds face

Gastric dilatation and volvulus, usually called bloat, is the one every owner of a deep chested dog should be able to recognise without hesitating. The stomach distends with gas and fluid, and in the volvulus form it rotates on itself, sealing both ends and cutting off its own blood supply. The pressure then interferes with blood returning to the heart. This is a surgical emergency measured in minutes and hours, not days.

A Newfoundland that is retching without producing anything, drooling heavily, pacing restlessly and swelling behind the ribs needs an emergency veterinary clinic immediately, not an appointment in the morning. Other signs include a tight or drum like abdomen, a hunched posture, pale gums, rapid shallow breathing and collapse. If you are unsure whether what you are seeing qualifies, this guide to dog emergency signs covers the thresholds that mean go now.

Preventive gastropexy, a surgical procedure that tacks the stomach to the body wall so it cannot rotate, is something many veterinarians discuss with giant breed owners, often at the time of another planned abdominal surgery. Whether it suits your dog is a conversation to have with your veterinarian well before an emergency, not during one.

Cystinuria and urinary tract signs

Cystinuria is an inherited defect in how the kidney tubules reabsorb the amino acid cystine. Instead of being reclaimed, cystine passes into the urine, where it can crystallise and form stones. Newfoundlands are one of the breeds in which this trait is recognised, and genetic testing is available through veterinary laboratories, so an affected or carrier status can often be known long before any stone forms.

Male dogs carry the greater risk of a true crisis, because a stone that moves into the narrow part of the urethra can obstruct the flow of urine completely. A dog that is straining in position and producing nothing, crying while trying to urinate, licking at the prepuce persistently, or becoming lethargic and vomiting alongside those signs is in an emergency situation and needs to be seen without delay.

Milder signs include blood tinted urine, frequent small puddles, accidents in a previously clean dog, and straining that produces only a dribble. Urinalysis, urine culture and imaging are how a veterinarian distinguishes stones from infection or other causes, and management of a confirmed cystine stone former, including any dietary plan or urine monitoring, belongs entirely in veterinary hands.

Eyes, skin, ears and lumps under a heavy coat

Eyelid conformation is a genuine Newfoundland concern. Entropion rolls the lid inward so lashes and hair abrade the cornea; ectropion rolls it outward and leaves the eye exposed and poorly protected; some dogs show a combination of the two, producing a loose, diamond shaped lid opening. Signs are squinting, tearing, discharge, rubbing at the face and redness. Chronic corneal irritation is painful and should be assessed rather than managed at home. Prolapse of the third eyelid gland, often called cherry eye, is also seen and appears as a pink mass at the inner corner.

That double coat is superb insulation and a difficult environment for skin. Moisture trapped against the skin after swimming or bathing, dense undercoat that has not been thoroughly dried, and friction in the neck and armpit folds can all set up hot spots and bacterial skin infection. The dense coat also hides problems, so running your hands over the whole dog during grooming is how many skin issues, and many lumps, are first found. Ear infections follow the same pattern: warm, hair covered, often damp.

Any new lump or swelling should be checked by a veterinarian, and only a needle sample or biopsy can tell what it actually is. Size, texture and how long it has been there do not reliably separate one kind of lump from another.

Heat intolerance in a dog built for cold water

A Newfoundland is engineered for cold water work: heavy body mass, thick insulating undercoat, water resistant outer coat. Every one of those features works against the dog in warm, humid weather. Dogs shed heat mainly by panting, and a large dog under an insulating layer struggles to move heat out fast enough.

Early signs of overheating are heavy frantic panting, bright red gums, thick ropey drool, slowing down or refusing to move, and unsteadiness. Vomiting, diarrhoea, collapse or disorientation indicate heatstroke, which is an emergency: begin moving your dog out of the heat and call a veterinary clinic on the way. Shade, access to water, avoiding exertion during the hottest part of the day, and keeping the coat properly maintained rather than shaved into a non functional state are all worth discussing with your veterinarian for your climate.

Vet visit or emergency? Sorting the signs

Concern	Signs that warrant an appointment	Signs that mean emergency care now
Heart	Tiring early on walks, occasional cough, a murmur heard at an exam	Fainting or collapse, laboured breathing at rest, blue or grey gums
Hips and elbows	Stiffness after rest, bunny hopping, reluctance on stairs	Sudden non weight bearing lameness after an injury
Stomach	Mild intermittent gurgling or gas with normal appetite	Unproductive retching, swollen hard abdomen, pacing, pale gums
Urinary	Blood tinged urine, frequent small amounts, accidents	Straining with no urine produced, crying, vomiting with lethargy
Eyes	Squinting, tearing, a pink mass at the inner corner	Sudden severe pain, cloudiness or visible injury to the eye
Skin and ears	New lump, head shaking, odour, raw patch under the coat	Rapidly spreading swelling, facial swelling, severe pain
Heat	Reduced stamina in warm weather	Collapse, disorientation, vomiting while overheated

Key Takeaways

• Newfoundlands do have breed health concerns, centred on the heart, the hips and elbows, the stomach, the urinary tract, the eyelids, the skin and ears, and heat tolerance.
• Subaortic stenosis is often first detected as a murmur at a wellness exam; an echocardiogram is what defines its significance.
• Hip and elbow dysplasia begin during growth, which makes growth management, body condition and screening conversations worth having early.
• Bloat is a surgical emergency. Unproductive retching plus a distended abdomen means go now.
• Cystinuria can be identified by genetic testing, and a male dog straining without producing urine is an emergency.
• Any new lump or swelling should be checked by a veterinarian, and only a sample can identify it.
• Predisposition is not destiny, and results vary from dog to dog.

Your veterinarian owns the diagnosis and the plan

Everything above is orientation, not a diagnosis. A murmur, a limp, a swollen abdomen and a straining dog all have multiple possible explanations, and only hands on examination, imaging and laboratory work can separate them. For a giant breed, consistent wellness exams are where joint changes, murmurs and urinary abnormalities tend to be caught while there is still room to plan rather than react.

If you are seeing something new in your Newfoundland, talk to your vet, describe what you have observed and when it started, and let the examination lead. Anything you choose to add around the edges of care sits alongside a veterinary plan, never in place of one.

Related reading: Newfoundland Dog Health.