My senior dog shivers in winter even indoors: is that normal?

Shivering can be down to cold, but in an older animal it is often tied to joint pain, muscle weakness or anxiety too, and these causes stack up. First make sure the resting area is warm, insulated from the floor and away from draughts. If the shivering persists in a warm room, or if stiffness and difficulty rising appear, raise it with the vet: arthritis or a treatable problem may be behind it, not just the cold.

Can I leave the air conditioning on when I go out?

Yes, and during heatwaves it is often the safest choice, provided the temperature is not too low and the flow does not point straight at the animal. Set a comfortable value, leave several water bowls, and make sure the animal can move to a less cold spot if it wants. Too big a swing between a freezing room and a scorching outdoors is itself a stress: aim for cool, not arctic.

Do senior cats or dogs need coats and blankets?

For many senior dogs, especially thin, short coated or arthritic ones, a warm garment on winter outings makes sense, as long as it does not restrict movement. Indoors, a bed insulated from the floor matters more. Cats rarely need a worn garment, which they often dislike, while warm, soft hiding places help. In all cases the rule is freedom of choice: the animal must be able to seek or leave the warmth.

How do I know if my home is too hot or too cold for him?

The most reliable way is to combine two pieces of information: a room thermometer in the spaces where the animal spends most time, and watching where it chooses to be. If it always seeks the cool bathroom tiles or stretches out away from every heat source, it is hot; if it curls up, shivers or crowds the radiators, it is cold. The temperature bands give you a starting point, but behaviour is what confirms it.

Caring for senior pets25 minLevel: BeginnerUpdated on August 19, 2026

Protecting a senior pet from heat and cold at home

Why older pets regulate temperature poorly, which thresholds matter room by room, and how to set up heat and cold with a routine and signs to catch early.

Audience: Pet owners
Species: Dog, Cat
Scope: Valid everywhere, Italy, European Union

What you need before you start

Un termometro ambientale per conoscere davvero la temperatura delle stanze dove l'animale sta di più
L'elenco aggiornato delle patologie e dei farmaci del tuo animale anziano, perché molti alterano la termoregolazione
Una zona di riposo fissa che puoi spostare e attrezzare a seconda della stagione

A young animal shrugs off a swing in temperature that an old one can no longer handle. With age the ability to regulate body heat drops: muscle mass falls, the coat thins, peripheral circulation slows, and there are often diseases and drugs that make things worse. The result is that the same muggy afternoon or cold night a two year old dog ignores can push a twelve year old into trouble. This guide explains why it happens, which temperatures to watch in the rooms where the animal actually lives, how to set the home up for heat and for cold, and which signs tell you to act at once.

Why older animals regulate heat poorly

Temperature control is teamwork between muscle, circulation, coat and behaviour, and in an older animal every part works a little worse. The muscle that produces heat shrinks, the fat and coat that insulate change, blood vessels adapt more slowly, and the urge to move to warm up or seek shade fades. On top of this come the diseases typical of age, which shift the balance further still.

Kidney disease and diabetes raise urine output and therefore the risk of dehydration in the heat.
Heart disease reduces the ability to cope with thermal stress, in summer and in winter alike.
Arthritis worsens with cold and damp, making even standing up to change spot painful.
Some drugs, such as diuretics and sedatives, alter hydration or the perception of temperature.
Cognitive decline can make an animal forget where its usual cool or warm spot is.

Which thresholds really matter

There is no single temperature that fits every animal, but there are sensible bands to start from and then correct by watching the individual. Measure the temperature in the room where the animal sleeps and the one where it spends the day, not the hallway: those are the two that count. Remember that humidity changes everything, because damp heat weighs far more than dry heat.

Indicative bands for a senior animal indoors. Values should be adapted to breed, coat and conditions and do not replace direct observation.
Setting	Comfort	Caution	Action
Room in summer	22-26 C	27-29 C	Above 29 C cool actively
Room in winter	20-24 C	16-19 C	Below 16 C add a safe heat source
Relative humidity	40-60 per cent	Over 70 per cent	With heat and high humidity cut activity
Resting area floor	Warm and non slip	Cold or hard	Insulate from the cold with a thick mat

Setting up for heat and cold

The best defence is not a single appliance, it is a resting area built for the season, combined with the freedom to choose. A senior animal must always be able to move from a cool spot to a warm one without effort and without jumping: if its only alternative to a freezing floor is a sofa too high to reach, it has no alternative at all. Set the room up with these steps.

Create two microclimates in one room
Set up a cooler spot and a warmer one a short distance apart, so the animal chooses for itself. A cooling mat on one side and a soft bed away from draughts on the other cover almost every day.
In summer cut the heat load
Close blinds and curtains in the hot hours, keep air moving and, if needed, use air conditioning without aiming the flow at the animal. Cool water should be in several bowls, not just one.
In winter insulate from below
Cold comes mainly through the floor. Raise the bed off the ground with a stand or a thick layer, and move it away from doors and windows that let draughts through.
Add warmth safely
If heat is needed, use sources made for pets, with a thermostat and warm, never scalding, surfaces. Always check the animal can move away from the source once warm enough.
Match walks to the right hours
In summer take the dog out at dawn and late evening, avoiding scorching tarmac; in winter shorten outings in the coldest hours and dry paws and coat well on return.
Check daily that it works
Touch the floor of the resting area, read the thermometer and see where the animal has chosen to lie. If it always seeks the coolest or warmest spot, the microclimate needs adjusting.

The daily routine by season

These measures only work if they become habit. Build a small routine, different for summer and winter, so you do not rely on memory on exactly the days the weather turns suddenly. A handful of fixed checks, always at the same points of the day, is enough.

In the morning check the temperature and humidity of the main room and adjust curtains, air or heating accordingly.
Make sure every water bowl is full and clean, and in summer add an extra one in the cool spots.
Watch where the animal chooses to lie: its position is the best thermometer you have.
Before outings weigh up the time and the ground temperature, not only the air temperature.
In the evening, in winter, check the resting area is away from draughts and well insulated from the floor.

Signs to catch at once

In a young animal a heat stroke or the start of hypothermia leaves room to react, in an older one far less. Learning the first signs lets you act while the situation is still reversible at home, and tells you when the clinic is needed without losing precious minutes.

Heat: heavy, continuous panting, a very red tongue, thick drool, weakness or staggering point to heat stroke.
Heat: tacky gums and skin slow to spring back mean dehydration, common in older animals in the heat.
Cold: prolonged shivering, a stubborn hunt for the warm spot, stiffness and reluctance to move.
Cold: cold extremities, unusual drowsiness and slowed breathing can mean early hypothermia.
In both cases, confusion or poor responsiveness is a sign not to put off.

Frequently asked questions

My senior dog shivers in winter even indoors: is that normal?: Shivering can be down to cold, but in an older animal it is often tied to joint pain, muscle weakness or anxiety too, and these causes stack up. First make sure the resting area is warm, insulated from the floor and away from draughts. If the shivering persists in a warm room, or if stiffness and difficulty rising appear, raise it with the vet: arthritis or a treatable problem may be behind it, not just the cold.
Can I leave the air conditioning on when I go out?: Yes, and during heatwaves it is often the safest choice, provided the temperature is not too low and the flow does not point straight at the animal. Set a comfortable value, leave several water bowls, and make sure the animal can move to a less cold spot if it wants. Too big a swing between a freezing room and a scorching outdoors is itself a stress: aim for cool, not arctic.
Do senior cats or dogs need coats and blankets?: For many senior dogs, especially thin, short coated or arthritic ones, a warm garment on winter outings makes sense, as long as it does not restrict movement. Indoors, a bed insulated from the floor matters more. Cats rarely need a worn garment, which they often dislike, while warm, soft hiding places help. In all cases the rule is freedom of choice: the animal must be able to seek or leave the warmth.
How do I know if my home is too hot or too cold for him?: The most reliable way is to combine two pieces of information: a room thermometer in the spaces where the animal spends most time, and watching where it chooses to be. If it always seeks the cool bathroom tiles or stretches out away from every heat source, it is hot; if it curls up, shivers or crowds the radiators, it is cold. The temperature bands give you a starting point, but behaviour is what confirms it.

What to do next

Start from your senior's conditions and drugs to see whether heat or cold is the bigger risk, measure temperature and humidity in the rooms where it lives, and create two nearby microclimates it can choose between without effort. Build a seasonal routine of fixed checks, match walk times to the ground temperature, and learn the first signs of heat stroke and hypothermia so you act while it is still reversible.