Rat respiratory signs: what to record and when to call a vet

Urgent: If your rat is struggling to breathe, collapses, is severely weak, is in severe pain or is not responding normally, contact an emergency vet service now. For other worrying changes, contact a qualified vet promptly. This guide helps you record what you see and prepare for a vet conversation. It cannot diagnose a rat.

What respiratory signs can look like

Respiratory problems can show as sneezing, snuffling, wheezing or breathing that looks or sounds different from normal. You may also notice discharge from the eyes or nose, red staining around the eyes or nostrils, a head tilt, reduced appetite, weight change, less movement, a hunched posture, less grooming or a coat that looks unkempt. These signs can have different causes. A symptom list cannot identify the reason for the change.

Rats may hide pain or illness. A change in one rat’s usual breathing, eating, activity or social behaviour is worth taking seriously.

New-home sneezing and possible irritants

“New home sneezes” is a common search phrase, but symptoms alone cannot identify the cause for an individual rat. A changed environment, dusty conditions, smoke, aerosols, strong scents or poor ventilation may be relevant, and illness can also be involved. If signs recur, progress or come with other changes, speak to a vet.

What to record for the vet

  • Which rat is affected and when you first noticed the change.
  • What the breathing sounds or looks like, whether the effort is changing and what the rat was doing when you noticed it.
  • Eating, drinking, movement, grooming, sleep and social behaviour compared with that rat’s usual pattern.
  • Eye or nose discharge, red staining, injury, changes in weight or any difficulty balancing.
  • Recent changes to bedding, cage position, cleaning products, smoke, aerosols, room conditions or companions.
  • Current medicines and relevant health history.
  • A short photo or video if it is safe and does not delay the call.

While arranging help

Keep the rat calm and safely contained. Remove an obvious irritant from the room if you can do so safely. Do not give leftover medicine, a home remedy or treatment intended for another animal. Do not start, stop or change a prescribed medicine without veterinary direction. The RSPCA rat health guidance also advises using only medicines prescribed for the individual rat.

Reduce avoidable respiratory stressors

Everyday prevention is about a clean, calm, well-ventilated environment. It is not a substitute for veterinary care when a rat is unwell.

  • Keep the cage well ventilated and out of draughts, smoke, aerosols and strong artificial smells.
  • Avoid dusty bedding and dusty surroundings.
  • Remove soiled bedding and uneaten food, and keep the cage clean so urine and faeces do not build up.
  • Keep the cage out of direct sunlight and away from areas that become very hot or very cold. Move it to a cooler area when summer temperatures are high.
  • Watch each rat’s breathing, appetite, drinking, movement, grooming and social behaviour during regular checks.
  • Ask a vet about routine health checks and use only medicines prescribed for that individual rat.

The RSPCA home-cage guidance and PDSA rat care guidance explain these environment and observation points in more detail.

What the vet may need to know

Take your notes, any medicine packaging and any safe photo or video to the practice. The vet can decide whether this rat needs an examination, testing or treatment. The same sign can have different causes, so do not copy another rat’s medicine or assume another animal’s plan applies.

If respiratory signs keep returning

Some rats need ongoing veterinary support for recurring breathing changes. Keep following the individual plan you were given and contact the practice if the pattern changes or a new sign appears. A vet can explain what to monitor for that rat.

Questions people ask

What does sneezing tell me?

Sneezing by itself cannot identify the cause. Note when it happens, what else you can see and whether your rat’s normal eating, activity or behaviour has changed, then share that record with a vet.

What is red staining around the eyes or nostrils?

The RSPCA explains that red staining can occur with stress or potential health problems. Note whether it recurs or is more than usual, and contact a vet if you are concerned.

Can I treat these signs at home?

Do not give medicine, a home remedy or treatment intended for another animal. A qualified vet can decide what this rat needs.

Can a rat recover?

The outcome depends on the cause and the individual rat’s condition. Ask the vet about that rat rather than relying on a general promise.

Sources and review note

Reviewed 6 September 2026. This guide helps owners prepare for veterinary advice. It was checked against the current RSPCA rat health and welfare guidance, RSPCA home-cage guidance and PDSA rats-as-pets guidance.