Before you trim your dog's nails you will need some supplies. First, purchase quality nail clippers that are intended for use on dogs. Dog nail clippers come in different sizes so make sure that you get the ones appropriate for the size of your dog. Nail clippers sized for small dogs like a Chihuahua will be totally ineffective on a large breed such as a Rottweiler. You should also have on hand some cotton balls, cotton swabs or clean towel in case you cut your dog's nails too short and they begin to bleed.

Before you begin, examine your dog's nails to determine the appropriate length to cut. The top side of the nail will be smooth and curved downward and the underside will be slightly concave and v-shaped. Next, locate the quick which is the sensitive flesh inside the nail. The quick will be easy to see if your dog's nails are white or lightly colored and more difficult if they are dark or black. To locate the quick in dark colored nails, determine from the underside of the nail where the flesh ends. Looking at the underside of the nail you will only want to trim the part that is hollow.

Put the clippers around the dog's nails allowing enough space so that you don’t cut the quick. When you are sure you are far enough from the quick squeeze the clippers and - voila! Note that if your dog's nails have not been trimmed in a while, the quick may be very close to the end. In this case you cannot trim the dog's nails immediately to an appropriate length. Trim as much as possible and then let them grow for a couple of weeks and trim them again. After regular trimming the quick will recede and they will reach a more manageable length.

If you happen to trim your dog's nails too short and they begin to bleed, you have cut the quick. Don’t feel too bad though; even veterinarians and experienced groomers accidentally cut the quick on a dog's nails from time to time. If this happens, the nail will bleed a lot but it is not a serious injury. Use cotton swabs or balls to apply pressure to the nail to help stop the bleeding if your dog will allow it. Cutting your dog's nails too short will be painful for him and may cause him to distrust you in future nail trimming sessions. If you cut the quick, it’s a good idea to stop trimming the rest of the nails and give your dog some time to recover