Is Your Maine Coon At Risk? 8 Common Maine Coon Health Issues You Shouldn’t Ignore

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The Maine Coon is one of the largest domestic cat breeds and a longtime favorite in the United States, known for its fluffy coat, friendly disposition, and impressive size.

While generally healthy, this breed is prone to several inherited conditions—including heart, joint, and muscular disorders—as well as some lifestyle-related issues like obesity and dental disease.

Understanding the most common Maine Coon health problems can help you catch early warning signs, manage risks, and keep your gentle giant thriving.

8 Common Maine Coon Health Problems

The Maine Coon is a Native American long-haired cat that was first recognized in Maine, later becoming its namesake. While the breed began as a glorified barn mouser, its significant stature made it popular among cat enthusiasts, even winning the first major cat show in the United States.

But beneath all that fluff and fame, Maine Coons are prone to several health concerns. While they’re generally hardier than many other purebreds, some genetic and lifestyle-related conditions can affect their well-being and longevity.

To better understand the risks, I spoke with Dr. Hannah Godfrey, BVetMed, MRCVS, a veterinarian who regularly sees Maine Coons in her practice. “The three most common health issues I have seen in Maine Coons are cardiomyopathy, osteoarthritis due to hip dysplasia, and stomatitis,” she says.

This guide covers eight health problems that Maine Coon owners should know. Learning the symptoms and treatment options can help you catch issues early and keep your cat healthy for years to come.

1. Hypertrophic Cardiomyopathy (HCM)

Hypertrophic cardiomyopathy (HCM) is a form of heart disease where the heart walls thicken, making it harder for the heart to pump blood efficiently. This condition can lead to heart failure, pulmonary edema, blood clots, paralysis, and even sudden death.

According to the Universities Federation for Animal Welfare (UFAW), about 30 percent of Maine Coons have a genetic mutation that predisposes them to HCM. However, carrying the mutation does not always mean the cat will develop the disease.

• Cats with the mutation on one copy of the gene (heterozygous) may never show signs of illness.
• Cats with the mutation on both gene copies (homozygous) are far more likely to develop the disease over time.

This is why DNA testing is so necessary. Responsible breeders avoid pairing two carriers, which lowers the risk of producing kittens that will develop HCM.

“Sadly, I have seen several Maine Coons with heart murmurs at a young age who I have diagnosed with HCM with the help of a heart scan,” says Godfrey. “The cats that I have seen have developed symptoms quickly, and medication has only kept them stable for a short while.”

Diagnosis & Treatment

Most Maine Coons who develop HCM show signs after the age of three, although some may not develop symptoms until later in life.

Annual vet exams are essential, especially after age three. Your veterinarian may recommend an echocardiogram (heart ultrasound) or genetic testing, especially if your cat has a heart murmur or known risk factors.

There is no cure for HCM. However, treatment focuses on managing symptoms and slowing progression.

• Medications may include beta-blockers or calcium channel blockers to reduce heart strain.
• Supplements such as CoQ10, L-taurine, and omega-3s may help support cardiovascular health.
• Routine monitoring and stress reduction can improve quality of life and help detect worsening symptoms early.

2. Hip Dysplasia

Hip dysplasia is a condition where the ball-and-socket joint of the hip does not fit together correctly. Instead of rotating smoothly, the joint is loose and misaligned, causing the bones to grind against each other. Over time, this repeated friction leads to pain, joint damage, and eventually osteoarthritis.

This condition affects movement and comfort. Cats may begin avoiding certain activities like jumping or climbing, and may show signs of discomfort when the hips are touched.

Feline hip dysplasia (FHD) is relatively rare in the general cat population but occurs more frequently in certain breeds. Data from the Orthopedic Foundation for Animals shows that approximately 25 percent of Maine Coons are affected.

Although the exact cause of FHD is unknown, researchers believe multiple factors are involved. Obesity can increase pressure on the hip joint and speed up wear and tear.

Selective breeding for larger Maine Coons may also play a role. One study found that as body mass increased, so did the severity of hip dysplasia symptoms. When breeders selectively bred cats with milder symptoms, the resulting offspring were also smaller.

Diagnosis & Treatment

Your veterinarian can confirm a diagnosis using physical exams and X-rays. If your cat is diagnosed with hip dysplasia, treatment options will depend on the severity.

Most treatment plans include:

• Anti-inflammatory medications to reduce pain and swelling
• Supplements such as glucosamine and chondroitin to support joint health
• Weight management through diet and portion control
• Low-impact exercise to maintain strong hip muscles
• Surgery for advanced cases or severe joint deterioration

“The Maine Coons I have seen with hip dysplasia and osteoarthritis have generally responded well to anti-inflammatory medication and weight management,” says Godfrey. “Although regular blood tests to assess their kidney function has been needed.”

3. Polycystic Kidney Disease (PKD)

Polycystic Kidney DisPolycystic Kidney Disease (PKD) is an inherited condition that causes fluid-filled cysts to form and grow inside the kidneys. These cysts are present from birth and gradually enlarge over time. As the disease progresses, the kidneys can become deformed and lose their ability to function correctly.

PKD is a dominant genetic disorder, meaning only one parent needs to carry the defective gene for a kitten to inherit the disease.

Eventually, these growing cysts can lead to chronic kidney disease or complete renal failure if not managed early.

Diagnosis & Treatment

DNA testing can identify the gene responsible for PKD, which helps breeders avoid producing affected kittens. If your cat is at risk or showing symptoms, your veterinarian may use imaging tools such as an ultrasound to confirm the presence of kidney cysts.

Blood tests and urine analysis can also be used to assess kidney health and monitor disease progression.

There is no cure for PKD, but supportive care can help slow the damage and maintain quality of life. Treatment options may include:

• Anti-inflammatory medications
• Appetite stimulants
• Antibiotics
• Fluid therapy
• Pain relief
• Prescription kidney diets or raw diets tailored to support renal health
• Kidney-support supplements, like VetriSciene’s Renal Essentials, to promote healthy kidney function

Early detection and regular monitoring are key to managing PKD and avoiding serious complications.

4. Spinal Muscular Atrophy (SMA)

Spinal Muscular Atrophy (SMA) is a rare neurodegenerative condition that affects the spinal cord and weakens the muscles of the hind limbs. It causes the gradual loss of motor neurons responsible for conscious muscle control, leading to muscle atrophy, coordination problems, and difficulty with mobility.

Although SMA is not painful or fatal, affected cats need additional care and home accommodations to stay comfortable and safe.

Diagnosis & Treatment

SMA is inherited through a recessive gene. A kitten must receive the defective gene from both parents to be affected.

Genetic testing is available and should be used by breeders to screen potential carriers and avoid producing kittens with SMA.

There is currently no cure and no way to slow disease progression. Treatment focuses on creating a safe and enriching environment at home.

• Provide ramps or steps to avoid jumping
• Use non-slip rugs and soft bedding
• Keep your cat mentally engaged with toys, puzzles, and interactive play

With a few lifestyle adjustments, many cats with SMA can still enjoy a happy and fulfilling life.

5. Stomatitis

Feline stomatitis, also called feline chronic gingivostomatitis, is a painful autoimmune condition that causes inflammation and ulceration of the mouth and gums. In this disease, the cat’s immune system overreacts to the bacteria in the mouth, attacking healthy tissue.

The result is severe oral pain, often leading to difficulty eating, weight loss, and a noticeable decline in quality of life. Many experts believe stomatitis has a genetic component, and Maine Coons may be predisposed.

Without treatment, the condition can cause gum recession, tooth loss, and even jawbone deterioration.

Diagnosis & Treatment

Diagnosis requires a physical exam, dental X-rays, and bloodwork to rule out other conditions such as calicivirus or kidney disease.

Mild cases can often be managed with dental care and anti-inflammatory treatments. In more severe cases, full or partial tooth extraction may be recommended to reduce immune system triggers.

“Stomatitis affects many cats, regardless of breed, and can be frustrating to manage,” says Godfrey. “With a wide range of treatment options available, though, I have managed to improve the comfort of the cats that I have seen.”

Treatment options may include:

• Probiotics and raw feeding to support oral and gut health
• Supplements like turmeric, boswellia, and proteolytic enzymes can reduce inflammation
• Cold laser therapy to relieve pain and promote healing
• Ongoing dental cleanings to maintain oral hygiene

With consistent care, many cats with stomatitis can experience significant relief and live comfortably.

6. Arthritis

Arthritis, or osteoarthritis, is a degenerative joint condition that causes stiffness, pain, and reduced mobility. Over time, the cartilage that cushions a cat’s joints wears down, leading to inflammation and discomfort.

According to VCA Animal Hospitals, about 90 percent of cats over the age of 10 have arthritis in at least one joint. Maine Coons, with their large frames and predisposition to hip dysplasia, may be at even greater risk.

Diagnosis & Treatment

Your vet can diagnose arthritis through a physical exam and X-rays. While there’s no cure, arthritis can often be managed successfully with a combination of lifestyle changes and supportive treatments.

Common treatment strategies include:

• Anti-inflammatory medications
• Joint supplements like glucosamine and chondroitin
• Prescription diets for joint support
• Gentle exercise to maintain muscle strength
• Weight management to reduce pressure on joints
• Soft bedding and easy access to food, water, and litter

Keeping your cat at a healthy weight, encouraging movement, and preventing injury—primarily through indoor living—are key steps in managing and preventing arthritis.

7. Periodontal Disease

Periodontal disease, also known as gum disease, is one of the most common health issues in cats. It involves inflammation and infection of the tissues surrounding the teeth, often leading to tooth loss and chronic pain if left untreated.

The Cornell Feline Health Center estimates that between 50 and 90 percent of cats over the age of four suffer from some form of dental disease. The most common types include gingivitis, periodontitis, and tooth resorption.

Prevention & Treatment

Regular dental care is key to preventing gum disease. Daily brushing is ideal, but even a few times per week can make a difference.

Other helpful tools include:

• Dental treats or water additives
• Prescription dental diets
• Oral gels or rinses designed for cats

Feeding a high-quality, balanced diet also supports oral health. If dental disease is already present, your vet may recommend a professional cleaning, antibiotics, or extractions in more severe cases.

Routine dental exams can help you catch problems early and keep your cat’s mouth healthy long-term.

8. Obesity

Cats are considered obese when they weigh 10 to 20 percent above their ideal body weight. Obesity can shorten a cat’s lifespan and increase the risk of developing additional health problems such as diabetes, arthritis, and heart disease.

According to VCA Animal Hospitals, adult cats between 8 and 12 years of age who are obese are 2.8 times more likely to die than cats at a healthy weight.

Prevention & Treatment

Preventing obesity starts with feeding a diet that fits your cat’s age, activity level, and overall lifestyle. Avoid free feeding and limit high-calorie treats.

Helpful strategies include:

• Measuring food portions based on your veterinarian’s guidance
• Feeding at set times each day
• Using interactive feeders or toys that encourage movement
• Scheduling regular play sessions to keep your cat active
• Visiting the vet regularly to monitor your cat’s weight

With consistency and care, many overweight cats can return to a healthy weight and enjoy a better quality of life.

Our Personal Experience With Maine Coon Health Issues

Maine Coons can be especially prone to weight gain due to their large size and big appetites. Longtime cat parent and LYC writer Danielle DeGroot shares her personal story:

When I was growing up, my family had a Maine Coon. Her name was Greta. She was a large, burly, indoor-outdoor cat. 

As a Maine Coon, she ate a lot but was also strongly motivated by food. She would eat the other cat’s food and the dog’s food.

She also found a lot of treats out wandering the neighborhood. Greta always made it home for dinner and left her bowl clean every time.

When she got older, she was clearly overweight. This affected her mobility.

She spent much less time roaming or outside. While this was preferable to her bringing home birds and mice, it was hard to see her less active. It also affected her demeanor, as she could not go off on her daily walks.

While we tried a diet with her; getting her to stay on it wasn’t easy. In the long run, this significantly contributed to her having some other health issues as she aged, including sore joints.

Danielle DeGroot, LYC writer and longtime cat parent

Genetic Testing For Maine Coons

If you’re purchasing a Maine Coon from a breeder, always ask for proof of genetic testing. Responsible breeders screen their cats for inherited conditions like hypertrophic cardiomyopathy (HCM), polycystic kidney disease (PKD), and spinal muscular atrophy (SMA).

Testing helps reduce the chances of passing on serious health problems.

Already have a Maine Coon? A cat DNA test can still be helpful.

You might consider testing to:

• Understand your cat’s genetic health and plan for any known risks.
• Confirm breeder claims, especially if your cat came with a health guarantee.
• Verify breed ancestry if you adopted your cat or aren’t sure about their lineage.

At-home DNA kits like Wisdom Panel and Basepaws can test for genetic markers linked to common feline diseases. Results typically arrive within 2 to 6 weeks and can help you and your vet make more informed healthcare decisions.

Frequently Asked Questions

Have more questions about Maine Coon health? Below are answers to some of the most common concerns cat parents have about this gentle giant breed. Understanding your cat’s risks can help you make better decisions about care, prevention, and long-term wellness.

Don’t see your question? Ask us in the comments!

How Do I Keep My Maine Coon Healthy?

Nutrition, activity, and grooming are the best ways to keep your gentle giant healthy. A quality diet for felines means plenty of high-quality animal protein, animal fat, vitamins, minerals, and water. A healthy diet may effectively delay the onset or alleviate the symptoms of health conditions.

Activity keeps your cat mentally stimulated and agile. Playtime also regulates weight and keeps your kitty happy. Dedicate at least 15 minutes of your day to your furry friend. (View our picks for best toys for Maine Coons.)

Regular grooming—brushing, nail clipping, and teeth brushing—is also essential for overall health and allows you to monitor your cat’s health.

What Is The Life Expectancy Of A Maine Coon Cat?

The Maine Coon’s lifespan is 10 to 15 years. We cover everything you need to know about Maine Coon lifespan, including factors influencing lifespan and tips to expand your cat’s life expectancy.

Should I Get Pet Insurance For My Maine Coon?

Pet insurance can be a smart investment for Maine Coon owners. It may help cover expensive breed-specific conditions like HCM or hip dysplasia and ease the financial burden of emergency care.

The critical thing to remember is to sign up for pet insurance before your cat suffers a health problem. Pet insurance does not cover pre-existing conditions, so the sooner your sign your cat up, the better chance for complete coverage. View our top picks for the best pet insurance for Maine Coon cats.

Caring For Your Maine Coon Long-Term

Understanding common health issues is just one part of being a responsible Maine Coon parent. Before bringing one home—or if you already have one—make sure you’re prepared for the time, cost, and care this breed requires.

Want to know what it really takes? Learn more about grooming, breeder costs, and long-term medical expenses in our Maine Coon price guide.