Rat respiratory infection: signs, vet care and support

My rat is struggling to breathe: what to do now

Ring a vet straight away, and an out-of-hours emergency vet if your own practice is closed. Rat Guide says a rat that is gasping, or whose gums, ears, feet or tail look blue or very pale, needs oxygen, which only a vet can give.

1. Ring first. Tell the practice the rat is struggling to breathe so they can triage you. Do not wait to film the sound or to see if it settles.
2. Keep handling to a minimum. Picking a breathless rat up repeatedly makes it work harder to breathe. Lift it once, gently, into the carrier.
3. Use a ready carrier. A small, secure carrier with a little clean, dust-free bedding or a fleece. Our guide to rat carriers covers what works.
4. Keep it warm, not hot. Avoid cold car journeys and draughts. A towel over part of the carrier keeps it calm and out of wind, while leaving air to flow.
5. Bring the details. When it started, what you saw, any medicine it has had, and what bedding and cleaners you use.

What are the signs of respiratory illness in rats?

The early signs are repeated sneezing, snuffling, noisy breathing, discharge from the eyes or nose and a drop in appetite and activity. The RSPCA lists "sneezing, wheezing or breathing strangely" and eye or nose discharge as reasons to contact your vet, and the PDSA adds head tilt, snuffling and weight loss.

• Sneezing that keeps happening, not a one-off after a sniff of dust
• Snuffling, wheezing, clicking, or a wet rattle from the chest
• Red-brown staining (porphyrin) around the eyes or nose that is more than usual
• Squinting, or discharge from the eyes or nose
• Breathing with visible effort: the sides or belly pull in hard with each breath; Wood Green describes a hollow look to the chest or flanks
• Hunched posture, a rough or fluffed-up coat, sleeping more
• Head tilt, which can mean the infection has reached the inner ear
• Eating less, or losing weight on the scales

Rat Guide splits the signs in two. Upper respiratory signs (nose, sinuses, eyes) range from none at all to sneezing, snuffling, squinting and rust-coloured staining. Lower respiratory signs (the lungs) are moist rattling breath sounds, laboured breathing, gasping and coughing, often with a hunched rat that is losing weight. Lower signs are the more serious.

A single observation cannot identify the cause. Listen while the rat is resting rather than repeatedly picking it up to reproduce a sound. Notice whether breathing looks harder than usual. Record what you hear and when, but do not delay contacting a vet in order to collect a perfect recording. If you are unsure whether a sound is hiccups or something more, our page on rat hiccups and breathing changes helps you describe it.

What does normal rat breathing look and sound like?

Normal rat breathing is quiet, even and fast. Rat Guide gives a normal resting rate of 71 to 146 breaths a minute, so a sleeping rat's sides flutter quickly; that alone is not a problem. What is not normal is breathing you can hear from across the room, a click or rattle, breathing that takes effort, or an open mouth. A new repeated respiratory sound warrants attention. Do not label wheezing or clicking as a personality trait, and remember that bruxing (teeth grinding) and the soft chatter in our guide to rat sounds are different from breathing noises.

What should I do if my rat has a respiratory infection?

Contact an exotics vet and describe the breathing change clearly. Tell the practice immediately if the rat is struggling or deteriorating, so it can direct you to urgent care. Do not assume the last prescription for another rat is suitable. Different problems can look similar to an owner, and a video cannot replace an examination. The vet decides what assessment and treatment are appropriate.

In the UK, the RCVS Find a Vet service lists practices; ring ahead and ask whether a vet there regularly treats rats. Our guide to checking whether your rat is sick helps you organise what you have seen before the call.

How do vets treat respiratory infections in rats?

Most vets start with an examination, listening to the chest, and a course of prescribed antibiotics. Rat Guide says mild cases may respond to antibiotics such as tylosin, tetracyclines or enrofloxacin, sometimes with an anti-inflammatory. Persistent cases, or ones that have reached the lungs, may need a second antibiotic, nebulised medicine, airway-opening drugs (bronchodilators) or steroids to calm airway inflammation, and oxygen if the rat is gasping.

Rat Guide advises going back to the vet if there is no improvement within five days, or sooner if the rat gets worse. Sources differ on how often antibiotics help in the long run: the MSD Veterinary Manual says they "may improve signs" but cannot cure the underlying infection. That is why treatment aims at a clear airway, steady weight and comfort, not a permanent cure.

Can you treat a rat respiratory infection at home?

No, not on its own: there is no home remedy that treats a rat respiratory infection, and a delay can let it reach the lungs. Do not use home remedies instead of veterinary care. Avoid scented oils, vapour products and unprescribed medicines. Keep handling and disturbance low while you arrange help, and follow the practice's instructions for transport and any interim care. Changing bedding or improving cleaning can remove an irritant, but improvement after a cage change does not prove that an infection was absent or cured.

What you can do at home, alongside the vet's plan, makes a real difference to how a sick rat copes. The next section sets it out.

How can I support my rat during treatment?

Follow the prescription and recheck instructions exactly. Ask the practice to explain anything unclear, including what to do if a dose is missed or cannot be given. Keep food and water accessible and record appetite, activity and breathing changes. Report deterioration rather than waiting for a course to finish. Do not change or stop treatment because an online owner describes a different experience.

1. Give every dose. Finish the course as prescribed, at the times set, even if your rat seems better after a few days.
2. Keep the room steady. The RSPCA gives 19 to 23°C (66 to 73°F) as ideal, and the PDSA 20°C (68°F). Keep the cage out of draughts and direct sun. Let the rat move away from any warm spot, as Rat Guide advises; our rat temperature guide has the details.
3. Clear the air. Swap dusty bedding for a dust-free paper or fleece option from our rat bedding guide, spot-clean wet patches daily and keep smoke, candles, air fresheners, fabric softener and scented detergents away from the cage.
4. Ask about steam. Rat Guide suggests short sessions in a closed bathroom with a hot shower running, or a cool-mist humidifier near the cage, to loosen mucus. Ask your vet if this suits your rat, and clean a humidifier after each use.
5. Bring food and water down. Put food and water on the same level as the bed so a breathless rat does not have to climb. Offer soft, tempting, high-calorie food such as soaked pellets, cooked egg or a little baby food without onion or garlic.
6. Weigh every day. Use kitchen scales and write the weight in grams. A steady drop is a reason to ring the vet even mid-course. If your rat stops eating, ask the vet about syringe feeding before you try it.
7. Keep the group together if the vet agrees. Rat Guide suggests a sick rat usually does better staying with its cagemates for comfort, unless it is being pushed off food or is stressed.

Rat Guide also mentions live yoghurt as a probiotic during antibiotics; ask your vet first, and see can rats eat yoghurt for safe amounts.

What causes respiratory disease in rats?

The most common cause is a bacterium, Mycoplasma pulmonis, which Rat Guide says is carried by nearly all pet rats. It often sits quietly and flares up when something weakens the rat. Other bacteria and viruses, including sialodacryoadenitis virus (SDA) and Sendai virus, can start an episode or make it worse. The Royal Veterinary College describes respiratory disease as a significant rat health problem.

Things that set off or worsen a flare-up, from Rat Guide, Wood Green, Burgess and the PDSA:

• Ammonia from urine building up in a dirty or badly ventilated cage
• Dusty bedding such as sawdust or wood chippings
• Pine or cedar shavings, whose aromatic oils irritate airways
• Poor airflow, such as a glass tank or a cage in a stuffy corner
• Stress: a move, new cagemates, overcrowding, noise
• Sudden temperature changes and draughts
• Smoke, sprays and scented products near the cage
• Old age, as the chronic infection tends to show more with time

It is not something an owner can reliably sort into a single cause by listening to a noise. Tell the vet about the group, recent arrivals, bedding, cleaning products and the room environment. Avoid presenting a guessed cause as a fact: a useful history says what changed, when it changed and what you actually observed.

Is an upper respiratory infection contagious in rats?

Yes, between rats, but not to people. Rat Guide says Mycoplasma passes between rats through close contact, from mother to babies and through the air over short distances, and that it does not infect humans. The MSD Veterinary Manual describes SDA virus as highly contagious, spreading through contact, the air and bedding; it usually lasts 2 to 3 weeks and most rats recover.

Some causes can spread between animals, but the right management depends on the case. Ask the treating vet what to do about companions, new introductions and shared equipment. Do not move a potentially unwell rat between groups or introduce newcomers while seeking advice. Equally, do not assume isolation is always the best answer without considering stress and the veterinary plan: MSD suggests keeping infected rats apart, while Rat Guide points out that cagemates have usually already been exposed and give comfort. We'd follow the vet who has seen the rat.

New rats are a different matter. Rat Guide advises a quarantine of at least two weeks before any introduction, and our guide to setting up a quarantine cage shows how.

Can rats recover, and can respiratory problems come back?

Many rats recover well from a flare-up, but the underlying Mycoplasma usually stays, so signs can come back. The outlook depends on the individual and the cause, so a guide cannot promise recovery or a particular timescale. Ask the vet which changes would count as improvement and which need an urgent call. Keep a brief dated record during care. If signs return, contact the practice again instead of restarting leftover medicine or assuming the previous explanation still applies.

Some rats, often older ones, develop long-term (chronic) respiratory disease that needs repeated or longer treatment. If breathing keeps getting harder despite treatment and the rat can no longer eat or rest comfortably, talk gently with your vet about quality of life.

How can I prevent respiratory problems in rats?

You cannot remove Mycoplasma, but you can make flare-ups less likely. Rat Guide says elimination is virtually impossible and that management means good housekeeping, dust-free bedding and draught-free housing.

• Dust-free bedding, never sawdust, pine or cedar (see our rat bedding comparison)
• Daily spot-cleaning of wet corners and a full clean about weekly, as in our rat cage cleaning guide
• A wire-sided cage in a ventilated, draught-free room at 19 to 23°C (66 to 73°F)
• No smoking, candles, air fresheners or plug-in scents in the same room
• A complete rat nugget diet and a healthy weight
• Two weeks of quarantine for any new rat
• A weekly weight check, so a slow drop shows up early

Quick comparison

Restful hides for a rat that is recovering