A sick dog lying down while being gently petted by its owner – illustrating care and compassion in dog diseases.

Dog diseases – Learn everything about prevention, symptoms, and treatments

Just like human illnesses, dog diseases are very serious. They can often be even harder to detect, since dogs cannot tell us where it hurts or what feels uncomfortable. This is why every small change in behavior can be an important signal for owners.

Dog diseases in brief:
– Many cancers and degenerative diseases are similar to those in humans.
– Infectious and genetic diseases can often be prevented with vaccination and screening.
– Behavioral changes are the earliest signs: lethargy, loss of appetite, inactivity.
– Veterinary check-ups are recommended every six months, even without symptoms.
– Early detection can save lives, as many conditions are treatable if diagnosed in time.

Why is early detection important?

Most diseases begin with mild symptoms that are easy to overlook. A dog may seem more tired, lose interest in play, or experience changes in appetite. However, these signs can often indicate serious problems such as cancer, joint disorders, or infections.

The most common dog diseases

Among the most frequent dog diseases are musculoskeletal issues (e.g. hip dysplasia, arthritis), various skin problems, allergies, cardiovascular conditions, and tumors such as osteosarcoma or lymphoma. On these subpages you will find detailed descriptions of the symptoms, treatments, and prevention methods for each disease.

What can the owner do?

It is the owner’s responsibility to notice changes in time and consult a veterinarian. Many illnesses can also be prevented with proper nutrition, regular exercise, vaccinations, and screenings. A strong immune system is the dog’s most powerful protection against diseases.

In this category we have collected the most common dog diseases, describing in detail the symptoms, treatment options, and prevention. Our goal is to help owners recognize problems early and provide all the guidance needed to keep their pets healthy.


Brain tumors in dogs
Brain tumors in dogs 1000 667 K9-DogHealth.com

Brain tumors in dogs

Brain tumors in dogs – Symptoms, diagnosis, treatment and daily care Brain tumors in dogs are abnormal cell growths that develop either within the brain itself or in the membranes covering the brain (meninges). They may be primary (originating in…

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Owner giving supplement capsules to support dog gut health
Dog gut health – Causes, symptoms and support 1000 667 K9-DogHealth.com

Dog gut health – Causes, symptoms and support

Restoring dog gut health – why it is important Restoring dog gut health can be crucial in many situations. The dog microbiome may be damaged after antibiotic treatment, but it can also become imbalanced due to chronic diarrhea, infections, parasites,…

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Dog resting after osteosarcoma diagnosis, showing signs of bone cancer in the leg.
Osteosarcoma (bone cancer) in dogs 1000 668 K9-DogHealth.com

Osteosarcoma (bone cancer) in dogs

Osteosarcoma (bone cancer) is one of the most common tumor types in dogs. It usually develops in middle-aged or older large-breed dogs (although it increasingly occurs in younger dogs aged 2–3 years), especially in breeds such as Saint Bernard, Newfoundland,…

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Small dog with diarrhea sitting on toilet – dog diarrhea support
Dog Diarrhea 1000 667 K9-DogHealth.com

Dog Diarrhea

Dog diarrhea – Causes, treatment, prevention and natural support Dog diarrhea is one of the most common issues you may face as a pet owner. Sometimes it’s just a simple digestive upset, other times it signals a more serious cause.…

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Dog holding an empty bowl in its mouth due to dog food allergy symptoms
Dog food allergy 1000 667 K9-DogHealth.com

Dog food allergy

Dog food allergy – How to recognize it and what you can do If your dog is constantly scratching, has digestive issues, or behaves strangely after meals, it may be struggling with a dog food allergy. This condition is becoming…

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Dog skin allergy 1000 667 K9-DogHealth.com

Dog skin allergy

Dog skin allergy – when constant scratching signals something more serious Dog skin allergy is not only uncomfortable but often painful – and it may be a sign of a more complex allergic reaction. It’s one of the most common…

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dog allergy
Dog allergy 1000 666 K9-DogHealth.com

Dog allergy

How to recognize dog allergy and what you can do about it Dog allergy is one of the most common health issues today, and it often goes unnoticed at first. Symptoms like itching, red skin, diarrhea, or ear infections are…

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Symptoms of dog cancer illustrated by a sad dog looking unwell
Symptoms of dog cancer 1000 667 K9-DogHealth.com

Symptoms of dog cancer

Symptoms of dog cancer – 10 early warning signs Cancer signs in dogs are unfortunately becoming increasingly common in our pets. They are very similar to those in humans, with the difference that our dogs cannot tell us what they…

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Immune support for dogs – senior dog sitting peacefully in the garden
Immune support for dogs 1000 668 K9-DogHealth.com

Immune support for dogs

Immune support for dogs – natural care for a longer, healthier life As our beloved dog enters the senior years, not only mobility may slow down, but the immune system also becomes less resilient. This is a natural process, yet…

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