Annual vaccinations: why are they so important for both dogs and cats?

Posted on: 13/01/2026
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Dominique

As a pet owner, you want nothing more than for your dog or cat to be healthy and happy. Good nutrition, plenty of exercise, and attention are essential, of course, but preventive care is also part of that. An important part of this is annual vaccination. For both dogs and cats, a vaccination can make the difference between a healthy animal and a sick one. Our vet explains why annual vaccination for dogs and cats is important.

Dogs and the risk of leptospirosis

One of the biggest dangers for dogs is leptospirosis, also known as Weil’s disease. This is a bacterial infection that can lead to severe kidney and liver damage and can even be fatal. What many owners don’t know is that leptospirosis is also a zoonosis: this means the disease can be transmitted to humans. This makes it a risk not only for dogs but also for the whole family.

The bacteria that causes leptospirosis is mainly transmitted by rats. Their urine can end up in ditches, puddles, and even in the soil. Many people think that only dogs that swim a lot in ditches or lakes are at risk, but that’s not true. Even during a walk through a park, forest, or even a residential area, a dog can come into contact with contaminated spots. Because rats are found almost everywhere, the chance of infection is higher than often thought.

Sometimes owners are hesitant about the leptospirosis vaccination. Yet this is truly an important shot, precisely because leptospirosis is serious and contagious. The vaccine provides protection for one year; after that, its effectiveness decreases. That’s why the advice remains to have dogs re-vaccinated annually.

Other important vaccinations: the DHP shot

In addition to leptospirosis, there is also the DHP vaccination. This protects dogs against three serious viral diseases: distemper, hepatitis (liver inflammation), and parvo. Parvo in particular can be fatal very quickly. Fortunately, the DHP shot offers longer-lasting protection: dogs only need this vaccination once every three years. We call this “tailored” vaccination: the leptospirosis shot remains necessary annually, while the DHP needs to be repeated less often. This way, a dog gets optimal protection without unnecessary vaccinations.

Cats and contagious diseases

For cats that go outside, there’s a high chance they will come into contact with other cats. During encounters, but also through shared feeding areas, contagious diseases can easily be transmitted. Think of feline panleukopenia or cat flu. Feline panleukopenia in particular can be very serious and even fatal. Vaccination prevents the spread of these diseases. It’s not just protection for your own cat, but also for the local cat population. The more cats are well-protected, the smaller the chance of an outbreak.

Indoor cats: less risk, but not risk-free

We often hear from owners of indoor cats that vaccination is less important because their cat has no contact with other animals anyway. While it’s true that indoor cats are at lower risk, they are not completely protected. Visitors who have had contact with other cats outside can bring in germs, and a cat can also come into contact with viruses during a vet visit.

Additionally, indoor cats often build up lower natural immunity due to their limited contact with other animals. If they do get infected, they can get sick more quickly. Some vaccines offer protection for up to three years for indoor cats, but this doesn’t apply to all shots. That’s why the advice is to have indoor cats checked by the vet annually as well. Together, you can determine which vaccination schedule fits best.

Good to know: fleas can certainly transmit diseases, but these are not diseases for which vaccination is possible.

More than just vaccinating: the annual health check

Vaccinating is important, but an appointment with a vet is about more than just the shot. During the annual check-up, the animal’s overall health is also assessed: teeth, weight, coat, ears, heart, and lungs are all covered. This allows problems to be detected early, even before there are visible symptoms.

Conclusion

Whether you have an adventurous dog that loves to swim outdoors or an indoor cat that never gets further than the windowsill: vaccination remains important. For dogs, the annual shot against leptospirosis is crucial, precisely because the disease lurks everywhere and is also dangerous for humans. In addition, the DHP shot is of great importance, providing protection against three serious diseases, including the deadly parvo virus. For cats, outdoor animals run extra risks through contact with other cats, but indoor cats also benefit from protection and check-ups.

With an annual vaccination and health check, every pet gets the best chance at a long, healthy, and carefree life.

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Priscilla
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Dankjewel!
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Giuseppe Tempone
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Jorden Van Heusden
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Henny Bruininck
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Freek Bruininck
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Aardige en professionele medewerkers.
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Gewoon meenemen die katten en honden, even testlopen afreken en genieten maar!
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In 25 jaar niets veranderd.
De inrichting is eenvoudig, de medewerkers zijn super sympathiek
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