Nearly everywhere in America, this summer is a scorcher, and we know that as a responsible pet parent, you want to do everything you can to keep your best four-legged friends cool. So when you look at your Pomeranian, Golden Retriever or long-haired cat wearing a thick, fluffy coat, you might feel tempted to break out your grooming tools and give him a serious hair cut.

But hold those clippers! While you or I would hate to sport a fur coat in 100-degree weather, your pets’ fur coats are actually providing them with heat relief.

“A dog’s coat is kind of like insulation for your house,” explains Dr. Louise Murray, Vice President of the ASPCA Animal Hospital. “Insulation stops your home from getting too cold in winter, but it also keeps it from overheating in summer—and your dog’s coat does the same thing.”

Dogs’ coats have several layers, and these layers are essential to your dog’s comfort in the heat. Robbing your dog of this natural cooling system can lead to discomfort and overheating. And keeping your dog cool isn’t the only reason to leave his coat intact, Dr. Murray warns. Your dog’s coat prevents your pup from getting sunburn and helps protect her from skin cancer.

So what can you do? “It’s OK to trim your long-haired dog’s long hair, such as any hair that hangs down on his legs,” Dr. Murray says. Just never attempt to clip mats off your pet’s coat with scissors, Dr. Murray adds. And if you’ve got a long-haired kitty, leave her coat intact. Instead, brush her a little more frequently during the hot summer months.

To protect your pet from sunburn and skin cancer, save longer walks for evenings, and consider applying pet-specific sun block to thinly covered areas like the bridge of your dog’s nose, the tips of his ears and his belly, Dr. Murray suggests, noting that pets with thin coats, as well as those with white or light-colored coats, are especially at risk for sun damage.

Of course, pet parents should remember to keep pets inside with plenty of water during hot days—hydration is key!