Boxer Health Problems and What to Ask a Breeder

Every breed has weak spots, and knowing the common Boxer health problems before you buy is the best protection you have. Boxers carry a real risk of certain cancers and heart conditions, plus a handful of joint, spine, eye and skin issues. Some can be screened for in a puppy's parents. Others cannot, and simply need an owner who knows what to watch for.

This page explains each condition in plain terms, then turns to the practical side: the tests the American Boxer Club and the OFA recommend for breeding dogs, what an OFA record shows, and what a written health guarantee should cover. For how long Boxers usually live, see our Boxer lifespan guide.

What cancers are most common in Boxers?

Cancer is the problem Boxer owners worry about most, and with reason. The American Boxer Club lists skin tumors and cancers of the brain, thyroid, mammary glands, testes, heart, spleen, blood and lymph system (lymphoma) among the risks in the breed.

Mast cell tumors deserve a special mention. They are skin tumors, and Boxers are one of the breeds most often affected. They can look like almost anything: a raised bump, a soft lump under the skin, or a spot that swells and shrinks. Many Boxers also get harmless lumps, and nobody can tell the two apart by look or feel.

Have any new lump checked by your vet rather than waiting to see if it grows.
A fine needle aspirate, where the vet draws a few cells out with a needle, is a quick first test.
Keep a simple map of your dog's lumps with dates, so changes are easy to spot.

Can Boxer puppies get cancer? It is uncommon, and most of these cancers appear in middle-aged and older dogs.

What is Boxer cardiomyopathy, or ARVC?

Arrhythmogenic right ventricular cardiomyopathy, or ARVC, often just called Boxer cardiomyopathy, is an adult-onset disease of the heart muscle that disrupts the heart's rhythm. Some dogs show no signs, others have spells of weakness or fainting, and in some the first sign is sudden death.

A routine exam can miss it, because the irregular beats come and go. The main screening tool is a Holter monitor, a small recorder worn in a vest for 24 hours to count abnormal beats. The American Boxer Club advises starting Holters in young adults and repeating them every year. A DNA test for a gene variant linked to ARVC also exists, but it shows risk, not certainty: dogs with the variant may stay healthy, and dogs without it can still be affected.

A veterinary cardiologist can often manage ARVC with medication. Fainting, collapse or a sudden drop in stamina should always prompt a heart check.

Are heart murmurs common in Boxer puppies?

They are not unusual, and many are harmless. Young puppies often have soft "innocent" flow murmurs that fade as they grow. The concern in Boxers is that a murmur can also be the first sign of aortic or subaortic stenosis, an inherited narrowing where blood leaves the heart for the aorta.

The American Boxer Club notes that this murmur has to be told apart from innocent ones, and that it sometimes does not appear until a dog has grown. Mild cases may never cause trouble and are compatible with a normal lifespan. Severe cases can lead to fainting, rhythm problems and heart failure.

The OFA says 8 to 10 weeks, before a puppy goes to its new home, is the best time for a preliminary heart exam.
If a vet hears a Boxer puppy heart murmur, ask how loud it is and whether it changes on a recheck.
An echocardiogram with Doppler, done by a veterinary cardiologist, confirms the cause.

Which other Boxer health problems run in the breed?

Hip dysplasia. The hip joint forms loosely, which leads to pain and arthritis. The American Boxer Club says signs such as lameness or reluctance to exercise usually appear between 4 months and a year old. X-rays diagnose it, and OFA hip ratings are given from 2 years of age. Keeping a young Boxer lean helps, and our Boxer size and growth chart shows what normal growth looks like.

Hypothyroidism. An underactive thyroid, which can be autoimmune, may cause weight gain, thinning hair and lethargy. A full thyroid panel confirms it, and a daily pill usually controls it well and cheaply.

Degenerative myelopathy (DM). This slow spinal cord disease of older dogs typically starts between 8 and 14 years of age, according to the OFA, with poor coordination in the hind legs. It progresses to paralysis over six months to a year, but it is not painful. A DNA test shows whether a dog is clear, a carrier or at risk.

Why do bloat and heat matter so much for a Boxer?

Bloat (GDV) is a surgical emergency in deep-chested dogs like the Boxer; our Boxer feeding guide covers the signs and how to lower the risk.

Heat. The AKC notes that Boxers do not tolerate extreme heat or cold well. Their short muzzle makes panting a less efficient way to cool down, so they overheat faster than longer-nosed dogs. Walk in the cool hours, give shade and water, and skip hard play on hot, humid days. Heavy panting, bright red gums, stumbling or collapse mean heatstroke: cool the dog with cool, not ice-cold, water and get to a vet.

What about eyes, skin allergies and deafness?

Corneal ulcers. Boxers are known for a slow-healing kind of corneal ulcer, often called an indolent ulcer, where the surface layer of the eye fails to reattach. Squinting, a watery eye or pawing at the face call for a vet visit the same day, and these ulcers often need the loose tissue removed before they heal.

Allergies. Boxer puppy allergies and adult allergies usually show up as itching: licking paws, scratching, rubbing the face, repeat ear infections or hives. Pollen, dust mites or a food ingredient can be the trigger. Allergies are managed rather than cured.

Deafness in white Boxers. The Boxer is on Louisiana State University's list of breeds with congenital deafness, and LSU notes that breeds with white pigmentation are the most affected. White Boxers, and Boxers with a lot of white, carry the higher risk. A BAER hearing test can check each ear in young puppies. Our page on white Boxers covers their other needs, such as sun protection.

How do you pick a healthy Boxer puppy?

Most screening is done on adult breeding dogs, because a puppy is too young for it. The OFA, working with the American Boxer Club, recommends these tests for Boxer breeding stock. A dog with all of them published in the OFA database, plus a microchip or tattoo, receives a CHIC number.

Screening	How it is done	Worth knowing
Hip dysplasia	OFA hip X-ray or PennHIP, registered with the OFA	OFA ratings start at 2 years old
Autoimmune thyroiditis	Thyroid panel from an approved lab, registered with the OFA	The club advises retesting breeding dogs yearly
Cardiac evaluation	Advanced exam by a board-certified cardiologist, with an echocardiogram, plus a Holter	Holter within 90 days of the exam; the adult clearance lasts one year
Degenerative myelopathy	DNA test from an approved lab	Clear, carrier or at risk
ARVC	DNA test from an approved lab	Shows the gene variant, not a diagnosis

A CHIC number means the tests were done and published, not that every result was normal. Heart clearances also expire, so an old cardiac exam tells you far less than a recent one, which is why the American Boxer Club asks for every test date to be listed.

Beyond paperwork, a healthy puppy is bright, curious and steady on its feet, with clean eyes, ears and coat. Every puppy on our available Boxer puppies page sees a vet before going home, with a health record of its vaccinations and deworming. Our Boxer breeder page covers more of what to look for.

What does an OFA record show?

The Orthopedic Foundation for Animals, or OFA, keeps a public database of health results that owners choose to submit. It is searchable at ofa.org by a dog's registered name or number, and each record is laid out the same way:

Every submitted test is listed with the date it was done and the dog's age at the time.
A cardiac entry shows whether it was a basic exam or an advanced one by a cardiologist, and the date matters because heart clearances expire.
DNA results for DM and ARVC read clear, carrier or at risk.
A CHIC number shows that the breed's recommended set of tests was completed and published.
Some records link to tested relatives, which gives a wider view of a family's health.

Only submitted results appear, so the database shows what was tested and published rather than a complete health history.

What should a written health guarantee say?

A health guarantee is a contract, so read it like one before you pay anything. Good ones are specific about:

Which conditions are covered, such as congenital or hereditary defects, and for how long.
How soon your own vet must examine the puppy after pickup, and what happens if that vet finds a problem.
What proof a claim needs, such as vet records or a specialist's diagnosis.
What you receive if a covered condition appears, such as a replacement puppy.
What voids the guarantee, in plain words.

Be wary of any seller who promises a puppy will never get sick. Nobody can promise that about a living animal. You can compare any contract with our health guarantee page.

Quick Answers

Are Boxers an unhealthy breed?

Boxers have well-known risks, especially cancer and heart disease, but many live full, active lives. Screened parents and early detection both improve the odds.

How do I know if my Boxer puppy is sick?

Call your vet if a puppy stops eating, vomits or has diarrhea more than once, seems unusually tired, coughs or struggles to breathe. A puppy that is not fully vaccinated and has vomiting and diarrhea should be checked for parvovirus the same day.

Does a DNA test replace a Holter or an echo?

No. The ARVC DNA test only shows whether a dog carries a variant linked to the disease, while a Holter records the heart's rhythm and an echocardiogram shows its structure.

Are Boxers sensitive to any medicines?

The American Boxer Club publishes a warning about acepromazine, a common sedative, because some Boxers react badly to it. Mention it to any vet who plans to sedate your dog.

Do Boxers get a lot of skin lumps?

Many do, and most turn out to be harmless. Mast cell tumors are common in the breed and can look just the same, so have your vet check any new lump, usually with a quick needle sample.