Four or five is the point where a guinea pig's care quietly changes gear. A guinea pig may live five to seven years and spends a real share of that span as a senior, and the animals that do best in those years are usually the ones whose owners weigh them weekly and notice early — because a guinea pig, like most prey animals, keeps eating and chatting in public long after something has started to go wrong in private. None of the senior routine is complicated. All of it is about turning 'seems a bit quieter' into numbers and notes you can act on.
Setting the enclosure up for older legs
Keep a senior guinea pig's world on one level: hay, water, food and the favourite hide all reachable without a ramp, and any ramp that stays should be shallow, covered and grippy. Fleece or deep soft bedding cushions feet that are doing more resting than running, and hay belongs in a pile at floor level as well as in a rack, so eating never depends on reaching up. Watch how your guinea pig moves to its vegetables: hesitation at a small step or a reluctance to cross the enclosure is information, and it usually arrives before any limp you could name.
The weekly checks, in order
Work through the same short list each week and note what you find:
- Weigh on kitchen scales at the same time of day and write the figure down; treat a steady downward trend as a vet conversation, even a small one
- Judge hay intake honestly, because hay drives both digestion and tooth wear in a guinea pig
- Check feet and nails: trim what needs trimming, and note any redness or swelling on the soles for the vet
- Look at the front teeth and the droppings, both quick windows on whether eating is going well
- Watch movement and company: still crossing the enclosure freely, still first or last to the vegetables
A guinea pig that stops wheeking for food it usually shouts for is telling you something, and it is worth hearing the same week.
A note on what home checks cannot do
These checks help you observe and decide what to do next; they cannot name a cause, and no home routine replaces an examination. A guinea pig that stops eating is an urgent case, not a watch-and-wait one, and breathing difficulty, rapid weight loss or sudden weakness all mean a veterinarian the same day. Weekly weights and dated notes are what turn that appointment from guesswork into a history.
Keeping the routine going
One person can run the whole routine in minutes, but it works best written down where anyone feeding or handling your guinea pig can see it — a companion, a family member, a sitter during a holiday all read the same baseline. Review the notes whenever life shifts: a new companion, a house move, a change from outdoor to indoor keeping. Before each senior appointment, gather those weekly weights and dated notes into the Pet Passport in KinsLe, ready to travel to the clinic, into boarding, or across to whoever is caring for your pet next.