06/25/2026
Built-In Sun Protection: The Basics on Fur and Temperature
That fur coat may look unbearably warm in the middle of July, but it actually serves as a natural sun shield and temperature regulator.
How Does a Dog’s Coat Keep Them Cool? A dog’s coat works to both cool and warm them, depending on the season. This is especially true for double-coated breeds, thanks to these key features:
Double Coat: Many breeds have a double coat—a dense undercoat beneath a longer, protective outer coat. The undercoat traps air, acting as insulation that helps maintain a stable body temperature, even in the heat.
Piloerection: Dogs can raise their fur (a process called piloerection) to create space between their skin and outer coat. This layer of air helps regulate body temperature much like insulation in a house.
Undercoat Maintenance: A clean, well-maintained undercoat allows for better airflow and prevents trapped heat. Mats or compacted fur block airflow and increase the risk of overheating.
Should you shave your dog in the summer? No, not if your dog has a double coat.
Shaving removes their natural insulation and can actually increase their risk of overheating and sunburn. Not only that, but shaving double-coated breeds could potentially cause long-term damage. The undercoat tends to grow back faster than the outer guard hairs, sometimes changing the coat’s texture, appearance, and ability to regulate heat.
Instead of shaving, ask your groomer to thin or trim the coat, leaving the outer guard hairs intact. If your dog’s coat is prone to matting, regular brushing is key to keeping them cool.
What about single-coated dogs?
Single-coated dogs can have very short or long hair, and the texture may be wiry, smooth, or curly — but all lack an insulating undercoat. Examples include Greyhounds, Boxers, Dalmatians, Poodles, Afghan Hounds, and Maltese.
Certain types of single-coated breeds may benefit from occasional trimming by a professional groomer, but shaving down to the skin should be avoided — always leave at least one inch of hair to protect from UV rays and skin irritation.
