Angela Maryville, Tennessee 4/6/2013 4:43:03 AM I am a proff. Groomer, in my shop we clipper long haired breeds for the summer all the time! If you live in a region where it's hot during summers, clipper your long haired pup down, it does not hurt anything. This article is not credible. Talk to your groomer, they KNOW what's best for your dog.