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Keeping Rabbits, Guinea Pigs, Hamsters & Gerbils Cool in a UK Heatwave
When the temperature climbs, small pets can struggle far more than we do — especially if they’re in hutches, runs, sheds, conservatories, or any space that gets direct sun.
The good news: a few simple changes can make a big difference. Below is a calm, practical plan you can use whenever the UK gets a hot spell.
Why heat is a bigger deal for small pets
Small animals don’t sweat like humans. They rely on airflow, shade, and sensible housing to stay comfortable. Heat stress can creep up quickly — particularly for:
- Older pets
- Overweight pets
- Long-haired breeds
- Pets with dental or respiratory issues
- Pets kept in enclosed, sun-facing spaces
Quick signs your pet may be too hot
If you spot any of the below, act straight away and contact your vet for advice:
- Rapid breathing or panting
- Lethargy, weakness, or not wanting to move
- Drooling
- Hot ears (common in rabbits) and warm body temperature
- Refusing food
Step 1: Shade and airflow (the non-negotiables)
Start with the basics — these are the biggest wins.
-
Move housing out of direct sun
Aim for full shade all day, not just in the morning. -
Increase airflow
If safe, open up ventilation panels. Avoid placing hutches/cages against walls that trap heat. -
Avoid direct fan drafts
Fans can help cool a room, but don’t point a fan straight into a hutch, run, or cage.
Step 2: Create a “cool zone” they can choose
Give your pet a cooler surface and let them decide when to use it:
- Frozen water bottles wrapped in a towel, placed beside (not on top of) the sleeping area
- Ceramic tiles or slate to lie on
- A damp towel over part of the run roof (only if it doesn’t block airflow)
Tip: Always leave an uncooled area too — pets should be able to move away from the cold.
Step 3: Water that actually gets drunk
In warm weather, hydration is everything:
- Offer both a bottle and a heavy bowl (many pets drink more from a bowl)
- Refresh water at least twice daily
- Place water in shade so it stays cooler
If your pet isn’t drinking well, speak to your vet — don’t wait.
Step 4: Feeding tweaks for hot days
Keep it simple and gut-friendly:
- Prioritise good-quality hay (always available)
- Offer watery veg in sensible amounts (think leafy greens rather than sugary fruit)
- Avoid sudden diet changes just because it’s hot
Step 5: Fly control (especially for rabbits)
Warm weather often means flies — and that brings a serious risk of flystrike for rabbits:
- Check your rabbit’s back end at least once a day
- Keep housing clean and dry
- Remove soiled bedding promptly
(We’ll cover flystrike prevention in detail in next week’s post.)
A quick note for hamsters and gerbils
Hamsters and gerbils can overheat too, especially in glass tanks, plastic cages, or rooms that get very warm:
- Keep enclosures out of direct sun and away from conservatories and windowsills
- Prioritise airflow (without creating a strong draft)
- Offer a cool surface (a ceramic tile works well) and plenty of fresh water
- Avoid over-handling during the hottest part of the day
Important: Never place a hamster/gerbil enclosure directly in front of a fan or put ice packs inside the enclosure where they can cause damp, chills, or chewing risks.
Heatwave checklist (save this)
- Shade all day
- Plenty of airflow
- Cool tile or wrapped frozen bottle
- Fresh water twice daily (bowl + bottle)
- Daily health check
- Clean, dry housing
Helpful essentials (without overcomplicating it)
If you’re topping up supplies for summer, focus on the basics:
- Extra water bottles/bowls
- Cooling tiles or safe “cool spots”
- Bedding that stays dry and comfortable
- Grooming tools (especially for moulting season)
Final thought
Small pets are brilliant at hiding discomfort, so it’s worth being a little “over-prepared” when the weather turns. A calm routine and a quick daily check can prevent most summer problems before they start.