Buy the right tool. Dog hair is tougher than human hair, so “never use ‘people’ clippers.” They may overheat “or even hurt Fido.” Conair’s entry-level canine trimmer retails for about $50.
Comb thoroughly before beginning. Again, you’ll need a dog-specific tool—a slicker brush—which can be found at any pet store. Brush first against the lay of the coat and then brush the hair back into place, untangling all mats and knots.
Secure your pooch. Leash your dog to a sturdy object and keep treats nearby in case he or she becomes restless.
Buzz away. Starting at the neck, run the trimmer toward your dog’s tail, then move on to the stomach and down the legs, always “moving with the hair’s grain.” Use scissors for facial hair and leave the fur a little longer on the face and tail.
Source: Men’s Health