Not every dog needs a winter coat. Many healthy, medium- to large-sized dogs with a thick undercoat do just fine in cold temperatures without extra protection. However, there are situations and types of dogs for which a functional, breathable winter coat or blanket is useful or even recommended—especially to keep the skin healthy and prevent irritation caused by moisture or trapped heat.

Which dogs benefit most from a winter coat?

The following dogs are at increased risk of getting cold or developing skin problems:

• Small dogs: They lose heat more quickly due to the unfavorable ratio of body surface area to body volume.
• Short-haired or sparsely coated dogs: Breeds without an undercoat (e.g., greyhounds, pinschers, Dalmatians) have virtually no natural protection against the cold.
• Older dogs: As dogs age, their muscle mass and metabolic activity decrease, leading to a reduction in heat production.
• Sick or recovering dogs: Conditions such as osteoarthritis, heart problems, or metabolic disorders reduce tolerance to cold.
• Dogs from warmer regions: Animals that originally come from southern countries are often genetically less well-adapted to cold winters.

Choosing the right jacket depending on the weather

Not every jacket is suitable for every weather condition. With breathable winter jackets, it’s especially important that thermal insulation and moisture-wicking properties work well together to keep your skin healthy.

Transitional season and cool weather

In temperatures just above freezing or in windy, wet conditions, the following is usually sufficient:

• a lightweight, wind- and water-repellent jacket

• a breathable dog sweater

The focus here is on protection against wind chill and moisture. Breathable materials prevent sweat or condensation from building up under the jacket, which could irritate the skin.

Freezing temperatures and snow

In case of severe frost or extended exposure to snow, it is recommended that you:

• a lined, insulated winter coat

• a warm, breathable sweater

Note that the jacket not only provides warmth but also wicks moisture away to prevent skin irritation and trapped heat. Dogs are particularly sensitive on their bellies and chests, where there is little muscle protection.

Unpredictable winter weather

When temperatures fluctuate widely, jackets with removable fleece liners are ideal. They allow for flexible adjustment without having to carry multiple jackets and protect the skin thanks to breathable materials.

Key criteria for a good winter coat

A functional dog coat should not only provide warmth but also support skin health:

• Fit: The jacket should fit snugly, but it shouldn’t chafe or restrict movement. The armpits, neck, and stomach are particularly sensitive areas.
• Freedom of movement: The shoulders and spine must not be restricted.
• Breathability: High-quality materials wick away moisture, prevent heat buildup, and protect the skin from irritation.
• Material quality: Water-repellent outer fabrics combined with warm, skin-friendly inner materials are more functional than just fashionable fabrics.
• Individual needs: The dog’s activity level, the duration of the walk, and its personal tolerance for cold are more important than general temperature guidelines.

A breathable winter coat or blanket reduces the risk of skin irritation, keeps the coat dry, and supports the skin’s natural protective function.

Conclusion

A dog coat is not a fashion accessory, but a health-related aid. When used correctly, it can significantly improve a dog’s well-being and skin health. Whether a coat is necessary depends on the individual dog, its physical condition, and the outdoor conditions.

You can tell if your dog is cold by observing its behavior: shivering, stiff movements, or avoiding movement can be signs of cold. If you have questions, veterinarians or experienced pet stores can help, as general recommendations don’t apply to every dog.

Extra tip: Choose breathable, moisture-wicking materials that protect your dog’s skin without restricting movement. This will help keep your dog healthy, warm, and active even in winter.