Get

In Your Inbox

Dogster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

11 Most Common Diseases, Illnesses & Health Risks in Dogs

sick golden retriever

If you recently purchased a new puppy or are considering getting a dog for your family, it’s common to wonder what the most common diseases might be so you can prepare for the worst. The good news is that reputable breeders have been carefully selectively breeding dogs to reduce the number of health problems for many years, and the modern K9 tends to be quite healthy and will likely provide you with many years of happiness.

However, there are a few problems that still pop up more frequently, and we’ve made a list of the most common ones so you can learn more about them. Keep reading while we talk a little about each problem potentially facing your dog, so you will know what to look for and what to do if you notice a problem.

Dogster divider_v2_NEW_MAY_24_

The 11 Most Common Diseases in Dogs

1. Arthritis

sick dog_Christin Lola_Shuuterstock
Image Credit: Christin Lola, Shutterstock

Arthritis in dogs is similar to what humans experience. The joints become swollen and inflamed, and movement becomes painful. It tends to worsen with age and wear and tear and can affect any or all joints in the body, but the knees, shoulders, and hips are often the most painful. Unfortunately, there is no cure for arthritis, but anti-inflammatories and joint supplements can help reduce inflammation, providing some relief.


2. Obesity

dog bloated stomach_Piqsels
Image By: Piqsels

Obesity is one of the biggest problems facing American dogs, and some experts suggest that more than 50% of dogs need to lose weight. Obesity can lead to several health issues, including diabetes and joint issues. Ensuring your pets get enough activity every day and following the suggested portion size for your dog can help prevent the onset of obesity. Also, avoid giving your dog human foods and overtreating them.

The exact amount of calories an individual animal needs to maintain a healthy weight is variable and influenced by many factors including genetics, age, breed, and activity level. This tool is meant to be used only as a guideline for healthy individuals and does not substitute veterinary advice 


3. Dental Disease

Dog with dental stone disease
Image Credit: Igor Chus, Shutterstock

Dental disease in dogs is a major issue, with some experts suggesting more than 80% of dogs over 3 have some form of the disease. Dental disease can cause pain, which can prevent the dog from eating properly, and even result in tooth loss. Manually brushing your dog’s teeth with a pet-safe toothbrush may sound strange, but it is the best way to slow the progression, along with regular veterinary visits and professional cleanings.


4. Cancer

Cancer is a word that no one wants to hear, but unfortunately, it can affect our dogs like it affects our human loved ones. Several types of cancer can affect your dog, and it is the leading cause of death for pets over 10 years old. Lymphoma, breast cancer, and bone cancer are the most common, but there are many others. Fortunately, many cancers are treatable if you catch them early, so you will need to be vigilant about taking your dog for routine checkups.

If you are concerned about the health and well-being of your pet, seek veterinary advice for the best course of action.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's our online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content Savings V1


5. Bloat

Bloat can be common in many dog breeds, especially those with deep chests. It occurs when the stomach is unable to release excess air, causing it to fill up, putting pressure on organs, and preventing blood flow. Sometimes, the air-filled stomach can twist on itself, a condition called gastric dilatation-volvulus, which impedes blood flow, potentially causing irreversible damage to the organ. This condition is life-threatening, and your dog will need immediate medical attention. Signs of bloat  include a swollen and painful stomach, restlessness, and excessive salivation.


6. Ear Infections

Dog ear infected by ear mites
Image Credit: Glikiri, Shutterstock

Any dog is susceptible to ear infections, but dogs with floppy ears are more prone. Floppy ears can trap and hold dirt and moisture, creating the perfect environment for bacteria and yeast to grow. Once an infection gets going, it can cause your dog to shake their head, scratch their ears, and you may also notice a bad smell. Luckily, ear infections are usually easy to treat with medication after visiting your vet, but prevention is the best method. Keeping your dog’s ears clean and dry can help prevent the buildup of dirt and moisture.


7. Hip Dysplasia

hip dysplasia in dogs
You are free to use this image but we do require you to link back to Dogster.com for credit.

Hip dysplasia is a common hereditary issue that affects many breeds. It’s the result of a malformed hip joint that causes inflammation and degeneration of the cartilage in the joint. If you notice your dog struggling to get up, avoiding stairs, and walking with a strange bunny hop gait, you might want to take your dog to the vet.


8. Cataracts

A pug with cataracts
Image Credit: Yekatseryna Netuk, Shutterstock

Cataracts is another condition that mainly affects older dogs but can also occur in younger ones on occasion. Cataracts are a cloudy film that develops over the eye’s lens, making it difficult to see. Doctors can often repair cataracts by removing the lens, but the condition often needs to progress until the dog has difficulty seeing before they can take action.


9. Heartworm

dog medicine_Shutterstock_LightField Studios
Image Credit: LightField Studios, Shutterstock

Heartworm is another common problem that can be transmitted through mosquito bites. The parasitic larvae transmitted in the bite make their way to the vessels of your pet’s heart and lungs, where they will begin causing problems. The best way to prevent your pet from getting heartworm is to give them a year-round preventative that will eliminate any heartworm problem.


10. Patellar Luxation

Patellar-Luxation-in-Dogs
You’re welcome to use our images, but we require you link directly to this site for credit (ex. Image from Dogster)

Patellar luxation is another common disease in dogs that affects the knee joint. Dogs with patellar luxation have a kneecap that will slide or pop out of place, causing the dog to hold their leg in a bent position or kick their leg out to the side. Dogs often require surgery to fix this issue.


11. Lyme Disease

Tick on dog hair
Image Credit: Olya Maximenko, Shutterstock

Lyme disease is a common disease that is transmitted by ticks. Any dog is susceptible because any dog can get ticks. Lyme disease is characterised by a fever, limping, and swollen joints and lymph nodes. Staying vigilant about removing ticks quickly and putting flea and tick medication on your dog can help reduce the risk of your dog getting Lyme disease.

Dogster divider_v2_NEW_MAY_24_

Conclusion

While this list may make it seem like dogs are prone to many health issues, most dog breeds are extremely healthy and will live many years requiring only routine veterinary care. We recommend brushing your dog’s teeth as often as possible to slow the progression of dental disease and pay close attention to the portion size listed on your dog’s food package to help your dog maintain an ideal weight. Also, keep up with regular veterinary visits and recommended preventatives.

See also:


Featured Image Credit: 135pixels, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything dog

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Dogster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

2 Responses

  1. I have an elderly Minature Pincer that is coughing as though she is yakking on a bone or such! She is becoming very lethargic ! She is eating little to no food. I am at my wits end! Her name is Sheba. She will occasionally let me know she wants to go out to relieve herself. Any advice?

    1. Hello David,

      thank you for your message and sorry for a bit of a delay. We are very sorry to hear about your Miniature Pincher and we sincerely hope that she is alright!
      If you would still, or anytime in the future, like to get a veterinarian input, don't hesitate to head to www.PangoVet.com and book a video call appointment with one of our professional veterinarians. In 20 minute call they will consult your dog's condition, let you know what is going on and how you can help.

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Can You Microwave Dog Food? Vet-Reviewed Pros & Cons

There’s nothing like a warm and comforting meal at the end of a long day. But have you ever wondered if your pets...

Ask Dr. Paola – Sitting Sideways, Excessive Sneezing & Scratching (August 18, 2025)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

The 3-3-3 Rule for Dogs: What Are the Phases of Adoption? (Vet-Approved)

Making the decision to adopt a dog is often life-changing and worthwhile for both you and your new dog. While dogs are known...

10 Dog-Friendly Hiking Trails in Virginia (2026 Guide)

Virginia is home to several dog-friendly hiking trails. No matter where you are in the state, there is probably a scenic hiking trail...

More related

Shollie (German Shepherd & Border Collie Mix): Info, Pictures, & Care

German Shepherd and Border Collie mixes are commonly called Shollies. Shollies are incredibly playful dogs that are protective of their owners and owners’...

How to Check & Care For Pet Stitches After Surgery: Our Vet Explains Stages of Healing

When you bring your pet home from surgery, it’s normal to have worries, questions, and concerns about how to look after them while...

German Shepherd Australian Shepherd Mix: Info, Pictures, Care & More

The German Australian Shepherd is a beautiful dog. These pups are a hybrid cross between the German Shepherd and the Australian Shepherd. Although...

Where Beagles Have Soared: On My Cessna, Dog Is Literally My Co-Pilot

Having a small plane and a pilot’s license is a blessing in these days of overbooked commercial flights, bizarre security measures, and inflexible...

Keep reading

Primal Dog Food Review 2026: Recalls, Pros & Cons

Review Summary If you have been thinking about taking your first steps into the world of raw dog food, Primal pet Foods might just convince you to take the plunge. It’s known for its quality, healthy raw food formulas. Primal...

Dogster_Primal Dog Food Review

9 Best Dog Foods for Cavalier King Charles Spaniel in 2026 – Reviews & Top Picks

The Cavalier King Charles Spaniel is a gentle, sweet-natured companion that makes an excellent addition to the family. Unlike some small breeds, the Cavalier King Charles Spaniel does well with children, is easy to train, and does not tend to...

Cavalier King Charles Spaniel puppy hairs stand up

Can Dogs Eat Acai Berries? Vet-Verified Info, Benefits & Risks

Pet owners are constantly on the lookout for foods that are safe, and beneficial, to their pets. With all the new superfoods entering our lives, it’s only natural for us to be curious as to whether we can share those...

Can Dogs Eat_acai berry

Can Dogs Eat Tomatoes? Health & Nutrition Facts

Whether eaten raw or cooked in a delicious sauce, tomatoes are a staple of many human diets. If you’re tempted to slip your dog a slice, you’ll first want to determine whether dogs can safely eat tomatoes. Ripe tomatoes are...

Can Dogs Eat Tomatoes

7 Best Dog Foods for Pitbulls to Gain Muscle in 2026 – Reviews & Top Picks

As pet owners, we all want our companions to thrive and give them the best we can give them when it comes to their nutrition. If you own a Pitbull, you understand that public perception has missed the mark, and...

pitbull eating

Purina vs. Pedigree Dog Food: 2026 Comparison, Pros & Cons

As a pet parent, you want only the best, healthiest food for your canine friend. However, there are so many choices out there it can get overwhelming pretty quickly. You may have researched several brands and concluded that Purina and...

Dogster_Dog Food Purina VS Pedigree

10 Best Low-Calorie Dog Foods in 2026 – Reviews & Top Picks

If your dog recently stepped on the scale and the number was a bit high, you know it’s time to make some changes. It’s not uncommon to see a chubby animal hobbling around a park or sidewalk these days. In...

Samoyed eating

Merrick Dog Food vs Blue Buffalo 2026 Comparison: Pros & Cons

If there’s one goal you should strive toward as a dog owner, it’s providing your pooch with the best life possible. You can do this by showering him with love, snuggles, and toys, but an even better way to ensure...

Dogster_Dog Food Merrick VS Blue Buffalo