"Should I have my dog clipped close for the hot summer months?" is a question asked by many dog owners at this time of year.

This is area of disagreement among professional groomers. Some experts advise short clips for heavy-coated dogs; others are so adamantly opposed to close clipping that they refuse to do it, even for their best clients.

If the experts can't agree, what's a pet owner to do? We asked Val Penstone, Best Friends Director of Grooming to help us sort through the controversy.

Penstone is not an advocate of close clipping, although there are times when it may be warranted. "In general, if the animal is healthy, even the longest-coated dog can be kept comfortable in hot climates."

"The key is thorough and frequent brushing to prevent matting," she explains. "A matted coat will trap heat and moisture, causing skin problems and discomfort. On the other hand, the hair on a well-brushed dog can actually help keep him cool by acting as insulation against the heat. It also provides protection from sunburn and from parasites."

Penstone agrees that for certain heavy-coated breeds, like a Samoyed or a Sheepdog, a short clip may be considered. However, she points out, coat thickness is not always the primary cause of susceptibility to heat stress. "Obesity plays a larger part. In hot weather, sensible precautions should be taken for all breeds, not just hairy ones. Curtail exercise in the middle of the day, and provide shade, access to a cool spot, or air conditioning."

Some dog owners request a short clip for smooth and short coated breeds, like Labs and German Shepherds, hoping it will cut down on shedding. In fact, notes Penstone, the shedding problem can be controlled just as well, if not better, with regular shampooing and brushing.

"If the decision is made to clip for summer comfort, it's important to remember that the clipped animal will need extra protection from the hot sun, flies and other parasites." Penstone recommends clipping in spring and again in mid-summer for maximum benefit. "Hair will grow back in before winter, and if the new growth is cared for, it will eventually be back to normal texture and length."