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Infecciosas

Complicated kennel cough

When kennel cough is complicated by a deeper secondary infection, it can progress to severe bronchopneumonia.

SevereDogs Contagious

Mizuu editorial teamupdated on October 14, 2026Not yet reviewed by a vet. Are you a vet? Review itReport an error

Reference sources: ESCCAP España · WSAVA · LeishVet · Manual MSD de Veterinaria

Symptoms to watch for

  • • Cough that worsens rather than improving
  • • Fever
  • • Marked lethargy
  • • Difficulty breathing
  • • Purulent nasal discharge
  • • Loss of appetite

Causes

Kennel cough (Bordetella, viruses) that becomes complicated by a secondary bacterial infection, especially in puppies, senior dogs or immunocompromised animals.

Diagnosis

Chest X-rays, blood tests and sometimes a culture.

Treatment

Antibiotics, respiratory support and hospitalisation in severe cases.

Prevention

Treat simple kennel cough promptly, vaccination, and protect vulnerable animals from the cold.

When should you see the vet?

URGENT if the cough is accompanied by fever, marked lethargy or difficulty breathing: the lung complication is serious.

Consult a vet

This guide points you in the right direction and takes you to the vet; it does not diagnose.

Notice: this information is for general guidance and educational purposes only. It does NOT replace diagnosis or treatment by a registered veterinary surgeon. If you notice any symptoms, always consult a professional. Mizuu accepts no responsibility for the use of this information without veterinary supervision.

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Complicated kennel cough in pets: symptoms, causes and treatment