Flu in dogs: see the symptoms and ways to prevent it

May 9, 2026
flu-in-dogs:-see-the-symptoms-and-ways-to-prevent-itFlu in dogs: see the symptoms and ways to prevent it

The signs can be confused with other respiratory diseases; Therefore, it is important to pay attention

Just like humans, dogs can also catch the flu — and it is quite common. The so-called canine flu is a contagious respiratory infection that can affect dogs of different ages, especially those that frequent environments with other animals, such as daycare centers, parks and pet stores.

According to Nátally Franco, professor of Veterinary Medicine at Faculdade Anhanguera, vaccination is the main form of prevention and is still little known among owners. “Many people don’t know that there is flu vaccine for dogswhich ends up leaving animals more vulnerable, especially in colder seasons or when viruses are more circulating”, he explains.

Canine influenza can be caused by different viruses and bacteria, with infection being more common with agents such as the canine influenza virus and the bacteria Bordetella bronchiseptica. Transmission occurs mainly through contact with respiratory secretions from other infected dogs.

Flu symptoms in dogs

Signs of the flu can be confused with other signs respiratory diseases; Therefore, it is important to pay attention. Among the main symptoms are:

  • Dry and persistent cough;
  • Runny nose (nasal secretion);
  • Frequent sneezing;
  • Fever;
  • Lack of appetite;
  • Apathy.

In more serious cases, the disease can progress to complications such as pneumonia, especially in puppies, the elderly or dogs with lower immunity.

The canine flu vaccine helps reduce the severity of symptoms if the animal comes into contact with the causative agents (Image: FamVeld | Shutterstock)

Vaccine can prevent complications

The canine flu vaccine helps reduce the chances of infection and, most importantly, the severity of symptoms. “Even when the vaccinated animal comes into contact with the virus, the tendency is for it to present a milder condition and recover faster”, says the veterinarian.

Immunization is usually indicated especially for dogs that frequently live with other animals. The protocol can vary, but generally includes initial doses and annual boosters.

Prevention goes beyond the vaccine

In addition to vaccination, some precautions help reduce the risk of dog flu:

  • Avoid contact with sick dogs;
  • Maintain the vaccination card up to date;
  • Ensure good nutrition and a balanced routine;
  • Sanitize objects and environments frequented by pet.

Even though it is, in most cases, a mild illness, dog flu should not be ignored. When noticing any symptoms, the ideal is to seek out a veterinarian for evaluation and appropriate guidance.

By Priscila Dezidério

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