Dogs cool themselves almost entirely by panting and by shedding heat through their paw pads and belly. They barely sweat. That makes them far worse at handling heat than we are, and it means the things that keep you comfortable are not the things that help them.
Start with the pavement rule
Press the back of your hand flat against the sidewalk and hold it for seven seconds. If you can't, your dog can't walk on it. On an 87°F day, asphalt in direct sun reaches around 143°F — hot enough to cause paw burns in under a minute.
Walk early morning or after dusk in summer. Grass, dirt and shaded paths run dramatically cooler than asphalt. This single change prevents more summer vet visits than any product will.
What actually cools a dog down
Cooling mats
Cooling mats such as a washable ice-silk mat work by conducting heat away from the belly and chest, where a dog's coat is thinnest. No power, no freezer, no water — they sit at room temperature, draw heat out of whatever is lying on them, and recover after fifteen or twenty minutes off.
Two practical notes. First, put it where they already like to lie; a mat in a spot they've never chosen will be ignored. Second, don't cover it with a blanket, which defeats the entire mechanism.
Raised cots
Underrated and very effective. An elevated cot bed gets the dog off hot ground and lets air move underneath them. On a shaded patio it comfortably outperforms a cushioned bed, which insulates in exactly the wrong direction. A raised cot also dries instantly, which matters if there's a pool involved.
A shallow pool
Wetting the belly, groin and paw pads cools a dog far faster than wetting their back — the coat on top actually traps water against warm skin and slows evaporation. A fold-flat pool a few inches deep does the job, and most dogs will stand in it voluntarily once they've tried it.
Not every dog swims. Fold-flat pools are for standing and lying in, which is the point.
Water, more of it than you think
A dog panting hard loses moisture continuously. On long walks and car trips, carry water — a collapsible silicone bowl or an insulated travel bottle takes up no room and removes the excuse. Cool water is fine; ice water is not necessary and can cause some dogs to drink too fast.
What doesn't work (or backfires)
- Shaving a double-coated dog. Huskies, Golden Retrievers, German Shepherds and Australian Shepherds have an undercoat that insulates against heat as well as cold, and it protects against sunburn. Shaving one removes that protection and the coat often grows back damaged. Brush the undercoat out instead — a deshedding rake does far more good than clippers.
- A fan alone. Fans cool humans through sweat evaporation. A dog with almost no sweat glands gets much less benefit. A fan plus a damp coat or a wet mat works; a fan by itself mostly doesn't.
- Leaving the window cracked in a parked car. A car at 70°F outside reaches 89°F in ten minutes and 104°F in thirty, cracked window or not. There is no safe version of this.
Know the signs of heat stress
Early: heavy panting, drooling more than usual, bright red gums, restlessness, seeking cool surfaces.
Serious: staggering, vomiting, diarrhea, confusion, collapse, gums going pale or bluish.
If you see the serious signs, move them to shade, wet them with cool — not ice-cold — water focusing on belly and paws, offer small amounts of water, and get to a vet immediately. Heatstroke in dogs can cause organ damage that shows up hours later, so "they seem fine now" is not a reason to skip the visit.
Higher-risk dogs
Flat-faced breeds (Bulldogs, Pugs, Boxers, Frenchies) are dramatically worse at cooling themselves because their airways are compressed — panting simply moves less air. Overweight dogs, very young and very old dogs, and dogs with heart or airway conditions are all higher risk. For these dogs, summer exercise should be short, early, and shaded, full stop.
The short version
Walk early, check the pavement, get them off hot ground, cool the belly and paws rather than the back, and never leave them in a car. A mat, a cot and a shallow pool cover most of it.
If the dog in question is a puppy going through their first summer, our new puppy checklist covers the rest of the kit, and an insulated travel bottle keeps the water cold enough that a hot dog will actually drink it.