Bordetella in Cats: Coughing, Contagion and When to Seek Help

By Dr Duncan Houston

A coughing or sneezy cat in a multi-cat household raises two questions: how unwell is this cat, and could others be exposed? Bordetella bronchiseptica is one bacterial cause of respiratory disease, although viruses and other conditions often cause similar signs.

Young kittens deserve particular attention because an upper-airway infection can progress to pneumonia.

Quick Answer

Bordetella bronchiseptica can infect cats and cause sneezing, nasal discharge, coughing and sometimes serious lower-respiratory disease. Close contact and respiratory secretions allow spread, especially in crowded environments. Contact your vet for respiratory illness, separate affected animals, and seek emergency care for laboured or open-mouth breathing.

How do cats catch it?

Infected animals shed bacteria in oral and nasal secretions. Close contact and contaminated equipment can contribute to transmission. Cats can acquire the organism from infected dogs as well as other cats. Shelters, catteries and busy multi-cat homes create more opportunities for exposure.

ABCD's feline Bordetella guideline describes the organism as a primary feline respiratory pathogen. A dog-associated nickname such as kennel cough does not mean cats are excluded.

What signs should you watch for?

Sneezing, a runny nose or eyes and coughing may be accompanied by fever, reduced appetite and lethargy. A congested cat may eat less because food is harder to smell. Kittens, cats with other infections and vulnerable adults can become much sicker. Persistent fast breathing or increased effort suggests the problem may involve more than the nose.

How urgent is it?

Signs	Concern	Action
Mild sneezing, eating and breathing comfortably	Respiratory infection needs assessment and spread control	Contact your vet for an appointment and advice
Cough, poor appetite, marked lethargy or an affected young kitten	Potential worsening or lower-airway disease	Veterinary assessment today
Open-mouth breathing, abdominal effort or collapse	Respiratory emergency	Emergency hospital immediately

What else can look similar?

Feline herpesvirus, calicivirus, Chlamydia felis, Mycoplasma and mixed infections can produce overlapping signs. Asthma can cause coughing without an upper-respiratory infection. Foreign material, heart disease and other chest problems may also cause breathing abnormalities. A cough alone cannot identify the organism.

How is it diagnosed and treated?

Your vet considers the clinical pattern and contact history, including new arrivals or coughing dogs. Culture or PCR on appropriate samples can help, but negative tests do not always exclude infection and results must fit the clinical picture. Chest imaging may be needed when pneumonia is suspected, once breathing is stable.

When Bordetella is diagnosed or strongly suspected, the vet selects an appropriate antibiotic and duration. Doxycycline is commonly considered in feline guidance, but owners should not choose a dose or substitute a leftover prescription. Ask how to give tablets safely because some can injure a cat's oesophagus if they lodge there. Severe cases may need oxygen, fluids, nutritional support and hospital nursing.

When is this an emergency?

Any struggling to breathe, persistent open-mouth breathing, blue or grey gums or collapse needs immediate care. Keep handling minimal and call ahead. Do not force-feed, steam a distressed cat in a closed room or delay for an online diagnosis.

What should you do next?

House the sick cat separately with its own bowls and litter tray.
Care for healthy animals first and wash hands between groups.
Track appetite, drinking, activity and breathing at rest.
Follow treatment and cleaning instructions, and ask when contact with other animals can resume.
Tell the clinic before arrival that respiratory infection is suspected.

Many cats improve with appropriate care, but improvement does not establish that shedding has stopped. Isolation duration should be agreed with the veterinary team.

Common mistakes

Assuming every sneeze needs the same antibiotic.
Sharing bowls and equipment during illness.
Using human cold medicines or essential oils.
Waiting when a kitten stops eating or breathing changes.

Prevention and household considerations

Reduce crowding, maintain ventilation and cleaning, and introduce new cats with a veterinary health plan. Bordetella vaccination is a risk-based decision where an appropriate feline product is available, not a universal substitute for hygiene. Rare human infections occur, particularly in vulnerable people; ask your own clinician for advice if someone immunocompromised shares the home.

Frequently asked questions

Can my cat catch it from my dog?

Yes, cross-species transmission is possible.

Can a cat carry it after looking better?

Yes. Follow veterinary advice on isolation and reintroduction.

Does the routine cat vaccine cover Bordetella?

Do not assume it does. Discuss the actual products and your cat's risk with your vet.

Can I manage breathing difficulty at home?

No. It requires emergency assessment and may need oxygen.

Good care means treating the affected cat and limiting exposure to others. Breathing effort is the signal to act immediately.

For help understanding your cat's health and preparing questions for your veterinary team, visit ASK A VET™. If your cat has emergency signs, contact an emergency clinic directly.