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Nancy Bynes, Certified Master Groomer with over 38 years of experience, originally published this information and photo in the Nevada City Union, June 2011.

As temperatures rise, many dog owners look for ways to keep their pets cool. One of the most common solutions? Shaving off all that hair. But while it may seem like a quick fix, it’s not always the best choice—especially for dogs with double coats.

Dogs typically fall into two coat types: single-coated and double-coated.

Single-coated breeds—like poodles, shih tzus, and bichons—have hair that grows continuously and can be safely clipped short. Their coats will grow back with the same texture and protection as before.

Double-coated breeds, however, are a different story. These dogs, such as golden retrievers, huskies, Australian shepherds, and Newfoundlands, have two layers of fur: a soft undercoat and a protective outer layer known as guard hairs. This natural insulation helps regulate body temperature in both cold and hot weather.

So what happens when you shave a double-coated dog?

You remove that natural insulation, prompting the dog’s body to overproduce fur to protect itself. But instead of regrowing the same sleek, protective topcoat, the coat returns as a dense, fuzzy mix of undercoat and short guard hairs—often referred to as “false coat” or “coat funk.” This false coat is too thick for summer and acts like a sponge, trapping heat, water, burrs, and debris.

Imagine heading outside on a 90-degree day. Would you choose a light t-shirt or thermal underwear and a sweatshirt? That’s what a dog with a false coat feels like—overheated and uncomfortable.

Rather than shaving, the better option for most double-coated dogs is a professional bath and blow-out. Grooming salons use high-velocity dryers that remove loose undercoat after a bath, allowing the coat to do its job without becoming overly dense. This keeps your dog cool, clean, and comfortable without compromising their coat health.

There are exceptions, of course. If your dog’s coat is severely matted or they have a skin condition requiring hair removal, shaving may be necessary. In these cases, work with both your vet and your groomer to make the best decision.

But if your only reason for shaving is to “keep your dog cool,” know that it may lead to more harm than good. Shaved dogs face increased risks of sunburn, heatstroke, and even skin cancer. And sadly, these complications can sometimes be irreversible.

The bottom line? Your dog’s coat is there for a reason. Before reaching for the clippers, talk to a knowledgeable groomer and consider coat-safe grooming options that protect your pet’s health while helping them beat the heat.