A sniffle in a guinea pig is never something to brush off. Respiratory infections are among the most common reasons guinea pigs see a vet, and they can quickly turn into pneumonia. This guide covers the warning signs of respiratory infections in guinea pigs, including the subtle ones many owners miss.
Quick Answer: Respiratory infections in guinea pigs are usually bacterial. Signs include sneezing, crusty eyes or nose, noisy or fast breathing and a poor appetite. Guinea pigs can go downhill quickly, so see an exotic vet within 24 hours of noticing symptoms.
Why Guinea Pigs Are Vulnerable
Guinea pigs hide illness well, so infections are often advanced by the time owners notice. Several bacteria can cause respiratory disease, including Bordetella bronchiseptica and Streptococcus species. According to the Merck Veterinary Manual, pneumonia is one of the most significant diseases of pet guinea pigs.
Bordetella can be carried by rabbits and dogs without obvious illness, which is one reason guinea pigs shouldn’t share housing with rabbits.
Warning Signs Owners Often Miss
Some signs are obvious, but others are easy to overlook.
Obvious signs
- Sneezing more than occasionally
- Discharge from the nose or eyes
- Crusty eyes or a crusty nose
- Coughing
Subtle signs
- Eating less, or skipping favorite vegetables
- Weight loss you may only notice on a scale
- Sitting hunched and less interested in exploring
- Fluffed-up fur
- Faster breathing with more visible side movement
- Clicking, wheezing or crackling sounds when breathing
- Wet fur on the front legs from wiping the nose
A healthy guinea pig sneezes now and then from dust. Repeated sneezing with any other sign is a reason to call your vet.
What Increases the Risk?
- Vitamin C deficiency, which weakens the immune system. See scurvy in guinea pigs.
- Dusty hay or bedding
- Poor ventilation and ammonia buildup from dirty cages
- Drafts and temperature swings
- Stress from new environments or companions
- Living with or near rabbits
- Age, with young and older guinea pigs most at risk
How Vets Diagnose and Treat It
Your vet will listen to the lungs, check the eyes, nose and teeth, and weigh your guinea pig. They may recommend X-rays or a culture to choose the best antibiotic.
Treatment often includes:
- Antibiotics that are safe for guinea pigs. Some antibiotics, including several in the penicillin family given by mouth, can cause fatal gut problems in guinea pigs. Only use medicine prescribed by your vet.
- Vitamin C supplementation.
- Assisted feeding if your guinea pig isn’t eating enough.
- Fluids for dehydration.
- Nebulization in some cases to help clear the airways.
Finish the full course of medicine even if your guinea pig seems better.
Home Care During Recovery
- Keep the room warm, around 65–75°F (18–24°C), and draft-free.
- Use dust-free bedding, such as fleece or paper.
- Offer fresh, high-quality hay and favorite vegetables.
- Weigh your guinea pig daily during illness.
- Keep the sick guinea pig’s cage-mate nearby for comfort, unless your vet advises separation.
How to Prevent Respiratory Infections
- Feed a diet rich in vitamin C every day.
- Choose low-dust hay and bedding.
- Clean the cage often to prevent ammonia buildup. Our guinea pig cage setup guide covers this.
- Keep the cage away from drafts, heaters and air conditioners.
- Quarantine new guinea pigs for 2 to 3 weeks.
- Don’t house guinea pigs with rabbits.
When to Call Your Vet
Go to an emergency vet now if your guinea pig:
- Is breathing with an open mouth or struggling to breathe
- Is very weak or not moving
- Hasn’t eaten for 12 hours or more
Book an appointment within 24 hours if:
- Your guinea pig is sneezing repeatedly or has eye or nose discharge
- You hear clicking or wheezing
- Your guinea pig is eating less or losing weight
Frequently Asked Questions
Can guinea pigs catch a cold from people?
Most guinea pig respiratory infections are caused by bacteria that don’t come from human colds. Still, good hygiene is wise around sick pets.
Is it contagious to my other guinea pigs?
It can be. Watch cage-mates closely, and talk to your vet about whether to treat or separate them.
How long does recovery take?
Many guinea pigs improve within a few days of starting antibiotics, but treatment often lasts 1 to 3 weeks. Pneumonia can take longer.
Should I use a humidifier or vaporizer?
Only if your vet recommends it. Steam from a shower or nebulizer can help some guinea pigs clear their airways, but the room must stay warm and draft-free. Never use essential oils near guinea pigs.
Can a respiratory infection come back?
Yes. Some guinea pigs carry bacteria long term, and stress or poor husbandry can trigger flare-ups. Good diet, clean low-dust bedding and steady temperatures help reduce relapses.
This article is for general information only and isn’t a substitute for professional veterinary advice. If you’re worried about your pet’s health, contact your veterinarian or an emergency animal hospital.
