Understanding Your Small Pet’s Behaviour
🤎 The short version: small pets can’t tell you how they feel, so they show you — and a lot of their odd-looking behaviours are actually good signs. This is a quick decoder for the common ones, from a guinea pig’s joyful popcorn to a ferret’s weasel war dance — plus the few that mean see a vet. For anything health-related, check your animal’s care guide or the health-check tool.
Happy behaviours (good to see)
- Popcorning (guinea pigs) — sudden leaps and twists in the air, especially in youngsters. Pure joy.
- Binky (rabbits) — a happy jump-and-twist mid-hop. A binkying rabbit is a delighted rabbit.
- Wheeking (guinea pigs) — the loud whistle-squeal when they hear the fridge or your footsteps. It’s the “feed me!” call, and a sign they associate you with good things.
- Weasel war dance (ferrets) — frantic, clumsy hopping and bumping into things when excited. Happy, not hurt.
- Soft tooth-grinding / bruxing (rabbits, guinea pigs, chinchillas, rats) — a gentle, purr-like grind means a relaxed, content animal.
Normal-but-surprising behaviours
- Self-anointing (hedgehogs) — frothing at the mouth and smearing saliva over their spines when they meet a new smell. Bizarre, but completely normal.
- “Crabbing” (sugar gliders) — a loud buzzing complaint, common when they’re startled or still settling in. It’s communication, not a health problem.
- Coprophagy / eating caecotrophs (rabbits, guinea pigs, rats) — re-eating certain droppings is normal and healthy; it’s how they absorb key nutrients. Never try to stop it.
- Hoarding and cheek-pouching (hamsters) — stuffing food into cheek pouches and stashing it in the nest is natural, not greed.
Behaviours that mean “see a vet”
Some behaviours are the opposite — early warnings from an animal that hides illness:
- Loud, harsh tooth-grinding — unlike the soft contented version, loud grinding often signals pain, especially with a hunched posture or not eating.
- Hunching, puffed-up stillness, or sudden withdrawal — classic “I’m in pain” signs in prey animals.
- Red tears (rats) — reddish staining around the eyes/nose isn’t blood but a stress/illness sign.
- Barbering or self-mutilation — over-grooming, fur-chewing (barbering) or self-inflicted wounds, often from stress (especially a lonely sugar glider or chinchilla).
- Repetitive bar-biting or pacing — often boredom or too little space; a cue to review housing and enrichment.
The honest takeaway
Most of your small pet’s weird behaviours are it telling you it’s happy — learn the vocabulary and you’ll read your animal far better. The key skill is spotting the change: a normally-active pet gone hunched and quiet, or a soft grind turned harsh, is worth acting on. See the full species guides for each animal’s specific body language.
Sources & further reading
- Hayfold — species care guides and glossary — per-species behaviour notes and definitions.
- RSPCA — pets — behaviour and welfare guidance behind these descriptions.
Common questions
What does it mean when a guinea pig popcorns?
Popcorning is when a guinea pig suddenly leaps and twists in the air, usually repeatedly. It’s a sign of happiness and excitement, most common in young, healthy guinea pigs — a good thing to see.
Why does my rabbit grind its teeth?
It depends on how it grinds. Soft, gentle tooth-grinding (a bit like a cat’s purr) usually means a relaxed, content rabbit. But loud, harsh tooth-grinding often signals pain, especially alongside a hunched posture or not eating — that’s a reason to see a vet.
What is the weasel war dance in ferrets?
It’s a burst of frantic, clumsy hopping, arching and bumping into things that ferrets do when they’re excited and happy. Despite how manic it looks, it’s a healthy sign of a ferret having fun, not distress.
Is it normal for a hedgehog to froth and lick its spines?
Yes — that’s self-anointing. When a hedgehog meets a new smell it may froth at the mouth and smear the saliva over its spines. It looks alarming but is completely normal and not a sign of illness.