Dog paw pads in heat and ice: burns, road salt, cracks and the check that catches them

Quick answer

A dog's pads are not leather. They are living skin with a thick outer layer, a fat cushion underneath, a dense blood supply and sweat glands, and every one of those parts can be injured by a surface the owner walked across in shoes without noticing.

Two seasons cause most pad injuries, and they injure differently. Heat burns the pad from outside in, so damage often looks minor for a day and then declares itself. Cold does most of its harm chemically, through de-icing salts and grit, and mechanically, through ice balls packed between the toes.

Build the paw check into a grooming session the dog already accepts. A dog that is used to having its feet handled is a dog whose injuries get found early.

• A pad burn frequently looks worse on day two than on the day it happened. Judge it again the next morning.
• Dark surfaces stay dangerously hot for hours after the sun has moved off them, so an evening walk is not automatically safe.
• Most winter pad damage is chemical burn and irritation from de-icing products, not frostbite.
• Do not soften healthy working pads with balm. Soft keratin tears more easily than firm keratin.
• Chronic paw licking is usually allergic skin disease, not a surface injury, and treating it as an injury wastes months.

Decide in 60 seconds

Why pads behave the way they do

The pad has four parts, and injury to each looks different.

The outer keratin layer is the thickest skin a dog has, textured with small conical projections that grip. It is built by use. A dog that walks daily on varied ground has a thicker, tougher layer than a dog that walks on grass and carpet, and the difference is a matter of weeks, not years.

Beneath it sits a fat and connective tissue cushion, an engineered shock absorber. When a pad is worn through, this is what becomes exposed, and it is why deep pad injuries hurt so much and heal so slowly.

The blood supply is unusually rich. Dogs have arteries and veins arranged so that blood heading into the foot is warmed by blood coming back out, a countercurrent system that lets a dog stand on frozen ground without the tissue freezing. That system defends against cold. It offers no protection at all against heat, because the same rich blood supply carries heat straight into the tissue.

The sweat glands in the pads are why a hot or anxious dog leaves damp prints. They contribute nothing to whole-body cooling but they do keep the pad surface slightly moist and pliable.

Two practical conclusions follow from this anatomy.

First, cold is generally survivable and heat is not. A dog will stand on snow for a long time before tissue is at risk, but a dog crossing a sun-heated surface can sustain a partial thickness burn in a distance measured in metres.

Second, pad toughness is trained, not applied. Conditioning comes from gradually increasing exposure to the surfaces the dog will actually use.

What a healthy pad looks and feels like

Do this in good light with the dog lying on its side or sitting, one foot at a time.

The pad surface should be uniformly textured and matte. A pad that has become shiny and smooth has lost its outer layer, either from abrasion or from heat.

Colour varies enormously between dogs and between individual pads on the same dog, so the comparison that matters is with that dog's other feet, not with a photograph.

The pad should be firm and slightly yielding, like a rubber eraser. Very soft, spongy pads usually belong to a dog that walks only on soft ground. Rock-hard, thickened, crusty pads point to hyperkeratosis rather than to fitness.

Spread the toes and look at the skin between them. It should be pale, dry and unbroken. Redness, moisture or a bad smell in the webbing is skin disease, not a walking injury.

Check the carpal pad, the small one higher up the front leg. It is easy to forget and it takes a surprising amount of damage on rough ground.

Check the nails at the same time. An overlong nail changes how the foot loads and shifts pressure onto pads that were not designed to carry it.

A towel, a bowl of lukewarm water and good light is the whole kit. Keep it by the door so the after-walk rinse actually happens.

Heat: how pads burn and why it declares late

Dark, dense surfaces absorb solar energy and release it slowly. Asphalt, dark paving, metal, artificial turf, boat decking, sand and the metal floor of a vehicle all reach temperatures far above the air temperature in direct sun, and they hold that heat well after the sun has moved off them. An evening walk on a road that baked all afternoon is a genuine hazard.

The commonly used rule of thumb is to place the back of your hand flat on the surface and hold it there. If you cannot keep it there comfortably for several seconds, the surface is too hot for a dog to walk on. It is a crude test and it is better than nothing, and its main value is that it forces the owner to actually touch the ground.

Burn severity is graded by depth.

Superficial. The pad is red or darker than its partner, tender, and the dog licks the foot. The surface is intact. This heals on its own with rest and protection from further contact.

Partial thickness. Blisters form, or the outer layer turns white or grey and later lifts away as a flap. This is painful, it is prone to infection once the surface opens, and it needs veterinary pain relief and dressing.

Full thickness. The pad surface is lost and the underlying tissue is exposed. These take a long time to heal, often need repeat dressing under sedation, and can leave a pad that is permanently less durable.

The reason burns declare late is that heat damage continues after the contact ends. Tissue that looked pink on the walk can blister overnight. Always reassess the next morning, and do not let a dog that seemed fine on the evening walk go straight back out the next day without a look.

Immediate treatment is cool running water over the foot for several minutes. Not ice, which causes further tissue injury on top of a burn. Not butter, oil or any home ointment, which trap heat and complicate the vet's job. Then keep the dog off the foot and off hot ground entirely.

Cold: salt, grit, ice balls and actual frostbite

Most winter pad damage has nothing to do with freezing.

De-icing salts. Sodium chloride is abrasive and drying. Calcium chloride releases heat as it dissolves, which is exactly why it melts ice, and it can produce a genuine chemical burn on a wet pad. Magnesium chloride and urea-based melts are gentler on skin but are still swallowed when the dog grooms. Pavement treated with salt looks the same as untreated pavement to a dog and to most owners.

Grit and sand. Abrasive, and it works its way into the webbing between the toes where it grinds with every step.

Ice balls. Snow packs into the hair between the pads and compresses into hard, sharp balls. Feathered feet on spaniels, retrievers, collies, huskies and doodle crosses collect them fastest. The dog stops to bite at them, which wets the hair further and makes more ice. Do not pull ice balls out; the hair is frozen into them and you will tear skin. Stand the foot in lukewarm water until they release.

Antifreeze. Ethylene glycol pools on driveways and garage floors in cold weather, tastes sweet, and is lethal in very small quantities. A dog that walks through a spill and licks its feet has ingested it. This is an emergency, not a pad problem.

Frostbite. Genuinely uncommon in pads because of the countercurrent circulation, and more likely on ear tips, tail tip and scrotum. When it does affect feet, the tissue is initially pale and firm and often painless, then becomes red, swollen and extremely painful on rewarming, and finally darkens over days. Rewarm with lukewarm, not hot, water and never rub the tissue.

Chronic pad problems that are not seasonal

Hyperkeratosis. Excess keratin builds up on the pad surface, giving a hairy or crusted appearance that keepers sometimes call hairy dog feet. Some breeds are predisposed and it also appears with age. The thickened tissue cracks, and the cracks are painful and can become infected. Management is softening and careful trimming of the excess by a vet or experienced groomer, not aggressive filing at home.

Allergic skin disease. By a wide margin the most common reason a dog licks its feet. The pattern is all four feet, over weeks or months, worse seasonally, often with itchy ears and a red belly at the same time. No amount of pad balm addresses it. This needs a proper work-up of the underlying allergy.

Interdigital furuncles. Painful swellings between the toes, often recurrent in the same spot, common in short-coated heavy breeds. These are usually driven by conformation, coarse hair and pressure rather than infection alone.

Grass seeds and awns. Seasonal in many regions. A sharp seed penetrates the webbing and migrates. The classic picture is a dog that was fine, then suddenly and severely lame on one foot, with a small hole and a swelling between the toes.

Pemphigus foliaceus. An autoimmune disease that causes crusting on the pads and the nose, symmetrical and stubborn. Requires diagnosis by biopsy.

Hepatocutaneous syndrome. Crusted, ulcerated, painful pads in an older dog, usually with liver or pancreatic disease behind it. This is one of the reasons that severe pad crusting in a senior dog deserves blood work rather than a foot cream.

Zinc-responsive dermatosis. Seen in some northern breeds, with crusting around the face and pads.

Balms, boots and wax: what works and how each fails

Balm on cracked pads. Reasonable. Softening a dry, cracked pad lets it close.

Balm on healthy working pads. Counterproductive. The toughness of a pad comes from firm keratin. Moisturising it daily makes it softer and more likely to tear on rough ground. Use balm to treat a problem, not to prevent one.

Wax barriers. Genuinely useful as a short-term barrier against salt and grit, and against abrasion on snow crust. They are not heat protection. Nothing you can apply to a pad meaningfully insulates it against a hot surface.

Boots. The only real protection against both heat and chemicals, and the hardest to get right. Common failure modes are boots that rotate so the seam sits under the pad, boots that are cinched too tight and cut circulation, boots that trap moisture and macerate the skin over hours, and boots that give a dog so much confidence on a hot surface that it exceeds what its legs and pads can take. Introduce them indoors, use them for short periods first, and check the feet every time they come off.

Trimming the hair between the pads. Cheap, effective, and the single best intervention for ice balls and for grit retention. Trim level with the pad surface, never scooped out below it, because that hair also cushions and protects the webbing.

The routine that catches problems early

Variation that changes the answer

Coat and foot type. Feathered feet collect ice and grit; bare feet burn faster. Both need attention, for opposite reasons.

Size and weight. Heavy dogs load their pads harder, so abrasion injuries and interdigital problems are more common.

Fitness and habit. The dog most likely to wear its pads raw is a fit, willing dog taken on an unusually long walk on an unusually rough surface. Working and sport dogs are at highest risk during the first outings of a season.

Age. Puppies have soft pads and no conditioning. Older dogs have thinner skin, slower healing, and are the group in which crusted pads may signal internal disease.

Climate. In hot, dry regions sand and metal are the hazards and asphalt burns for most of the year. In cold, wet regions chemical melts and constant wetting are the hazards, and macerated, softened pads tear easily. In humid tropical climates the dominant paw problem is not seasonal injury at all but chronic wet dermatitis between the toes.

Surface at home. A dog that lives on smooth tile or laminate and walks on grass has soft, unconditioned pads regardless of how much exercise it gets.

What never to do

Do not apply ice to a burned pad. Ice injures already damaged tissue.

Do not put butter, oil, toothpaste or any human burn remedy on a pad.

Do not pull frozen ice balls out of the hair between the toes.

Do not bandage a paw at home unless a vet has shown you how and has told you to. Home paw bandages are the commonest cause of pressure injury in general practice: they are applied slightly too tight, they slip and bunch, they get wet, and the dog cannot tell you the toes have gone numb.

Do not file, cut or shave hyperkeratotic pads aggressively at home. The thickened tissue is not evenly thick and you will cut into living skin.

Do not treat months of paw licking with a topical product. If all four feet are involved and it has gone on for weeks, the cause is inside the dog.

Do not assume a dog that is not limping is not injured. Dogs conceal foot pain reliably, especially when they want to keep walking with you.

When to get help

Contact a vet the same day for any pad with a blister, a flap of lifted surface, exposed raw tissue, or bleeding, and for a dog that will not put weight on a foot.

Go promptly for sudden severe lameness on one foot after walking in long grass or crops, because a migrating grass awn is a problem that gets worse and harder to find with time.

Book an appointment rather than an emergency visit for cracks that keep returning, thickened crusted pads, and any dog licking its feet persistently for more than a couple of weeks.

Treat as an emergency any dog that has walked through antifreeze, or that shows vomiting, tremors, wobbliness or disorientation after being out on treated pavement.

At the appointment the vet will assess the depth of any pad injury, provide pain relief that is genuinely effective in dogs, clip and clean the area under sedation if needed, apply a dressing that will stay put, and decide whether antibiotics are warranted rather than reflexive. For chronic pad disease they will look beyond the foot, with skin cytology, sampling for infection, and blood work in older dogs where crusted pads may point to liver disease.

Bring photographs of the pads taken on the day of injury, the name of the surface the dog walked on, the product used on your pavement in winter if you know it, and a record of how the walk length or terrain changed recently.

The goal is a dog that offers a paw without fuss. That single habit turns pad checking from a wrestling match into ten seconds after every walk.