singapore rabbits

air quality impact on rabbits during haze

updated 19 May 2026

Singapore sits within the haze belt of Southeast Asia. every year, typically between June and October, smoke from forest fires in Sumatra and Kalimantan drifts across the Strait of Malacca. the PSI can spike from a normal reading of 50 to above 150 within hours. for most SG residents, the response is automatic: close the windows, switch on the AC, and wait it out. but if you own a rabbit, that response is only half the solution. rabbits are far more sensitive to airborne particles than humans, and well-meaning owners often miss the specific steps that actually protect them.

why rabbits are more vulnerable than cats or dogs

rabbits are obligate nasal breathers. unlike cats or dogs, they cannot switch to breathing through their mouths when their nasal passages are irritated or obstructed. every single breath passes through the nose and into the lungs, without exception.

their respiratory rate compounds the risk. a healthy rabbit breathes 30 to 60 times per minute at rest. a cat breathes 20 to 30 times per minute. a dog breathes 15 to 30 times per minute. the higher rate means your rabbit accumulates more fine particle exposure per hour than any other common household pet.

fine particles in haze, categorised as PM2.5, measure 2.5 microns or smaller. at that size, they bypass the upper airway and deposit directly in the lower lungs. repeated exposure causes chronic inflammation. in rabbits carrying subclinical Pasteurella (a bacterial infection many rabbits harbour without obvious symptoms), haze can trigger a flare into full respiratory illness.

on top of this, rabbits are prey animals. they suppress visible signs of illness as long as possible. by the time your rabbit is showing obvious breathing difficulty, the problem has often been building for many hours.

reading Singapore’s PSI and PM2.5 levels

the National Environment Agency (NEA) publishes real-time PSI and 1-hour PM2.5 readings at haze.gov.sg. the 24-hour PSI average is the number most media reports lead with, but the 1-hour PM2.5 concentration is what your rabbit is actually breathing right now.

general thresholds for rabbit owners:

  • PSI 0 to 50 (good): no changes needed. normal indoor ventilation is fine.
  • PSI 51 to 100 (moderate): begin closing windows. monitor your rabbit and note any change in behaviour.
  • PSI 101 to 200 (unhealthy): close all windows and doors. run HEPA filtration. keep your rabbit to indoor spaces only.
  • PSI above 200 (very unhealthy to hazardous): treat this as a health alert for small animals. maximum indoor protection, active filtration running continuously, and watch closely for any respiratory signs.

the PSI scale was calibrated for human health. rabbits are smaller and more sensitive. it is safer to act one level earlier than the human guidance suggests.

indoor air quality in HDB flats

most HDB flats are not airtight. even with windows closed, PM2.5 seeps through door gaps, window frame gaps, and ventilation openings. closing windows is necessary but not sufficient on its own.

HEPA air purifiers are the most effective tool you can use. a HEPA filter captures particles as small as 0.3 microns, well within the PM2.5 range. place the purifier within two to three metres of your rabbit’s enclosure. a unit rated for a 20 to 30 sqm room is appropriate for a typical HDB bedroom. as of 2026, entry-level HEPA purifiers cost around SGD 150 to SGD 250 at major electronics retailers, with better units running SGD 300 to SGD 500.

air conditioning is an underappreciated asset during haze. an AC unit running on recirculation mode pulls indoor air through its filter, cools it, and returns it, without drawing in haze-laden outdoor air. the catch is the filter: a dirty AC filter becomes a particle reservoir that spreads contaminated air throughout the room. clean your AC filter at the start of every haze season, and once more mid-season if the haze is prolonged.

remove additional irritants from rooms where your rabbit spends time. incense, scented candles, essential oil diffusers, and aerosol sprays all add chemical load on top of PM2.5. these should be off during any haze period, and kept away from rabbit living spaces year-round.

before haze season arrives in June, run through a quick checklist: clean or replace the AC filter, confirm your HEPA purifier filter is within its service window (most need replacing every six to twelve months), and stock two to three days of hay and pellets so you are not heading outdoors during a peak haze period. if you do not yet have an exotic vet contact, find one now. our vet directory lists SG clinics that see rabbits, including some with after-hours availability. finding a vet under pressure is much harder than doing it in advance.

signs your rabbit is struggling with air quality

knowing what to look for matters as much as any protective measure. early signs of respiratory irritation include:

  • sneezing more than a few times per day, particularly in rapid repeated fits
  • clear or slightly cloudy discharge from the nose
  • watery or crusty eyes
  • reduced appetite or energy noticeably different from your rabbit’s usual baseline
  • sitting in a hunched posture with ears held flat against the back

these early signs warrant close monitoring. if any persist beyond 24 hours, or if the discharge turns yellow or green, call a SG exotic vet that day rather than waiting.

urgent signs requiring same-day vet attention include:

  • breathing that looks effortful, with the sides visibly heaving
  • head tilted upward or neck stretched forward, a posture that signals the rabbit is working to get air
  • an audible clicking, rattling, or wheezing sound with each breath
  • blue or pale gums (this is a medical emergency; seek care immediately)
  • complete refusal to eat for more than 12 hours alongside any other sign on this list

rabbits can deteriorate quickly once respiratory distress sets in. do not wait to see if it resolves on its own.

managing exercise and outdoor time

some SG owners give their rabbits free-roam time in HDB corridors or void decks. during haze, these spaces carry essentially the same air quality as the outdoors. a corridor is not a protected space.

suspend corridor and outdoor exercise whenever PSI is above 100. run your rabbit indoors in rooms with filtration active.

rabbits living in balcony enclosures must be moved indoors during haze. a balcony provides no PM2.5 protection regardless of any mesh or screen in place. fine particles pass through any mesh that still allows airflow, which is all of them.

check the NEA 1-hour readings before allowing outdoor access, not just the appearance of the sky. haze can sit at significant PM2.5 concentrations even when visibility looks acceptable to human eyes. the sky clearing up visually does not mean the air has cleared.

what owners often get wrong

relying only on the 24-hour PSI average. the 24-hour number can read “moderate” at 80 while the current 1-hour PM2.5 reading is at hazardous levels. always check the 1-hour PM2.5 concentration. that is what your rabbit is breathing right now.

thinking closed windows are enough. without a HEPA purifier actively running in the room, PM2.5 accumulates indoors even in a sealed flat. a purifier is the practical difference between meaningful protection and false reassurance. closing the window is step one, not the whole solution.

dismissing haze-season sneezing as just irritation. a sneezing rabbit during haze is not automatically fine. Pasteurella can flare under immune stress from sustained particle exposure. if sneezing produces coloured discharge or persists longer than one day, see an exotic vet rather than waiting it out.

not moving balcony rabbits indoors. many SG owners keep rabbits in balcony enclosures year-round because of space constraints in HDB flats. during haze episodes, the balcony is effectively outdoors. move the enclosure inside and run filtration in that room for the duration of the haze.

community-sourced information here is not veterinary advice. for any health concern see a licensed SG exotic vet.

community-sourced information, not veterinary advice. for medical issues, see a licensed SG exotic vet — start with our vet directory.

related