There are two types of canine nail clippers: a scissors type and a guillotine type. They work equally well, so use what you are most comfortable with. Make sure you purchase the correct size for your dog.
If your dog won't tolerate either type of clippers, you can try using a nail grinder—an electric tool that sands down nails. Grinders offer control, but they take more time to use than clippers, and some people and dogs dislike the sounds and vibrations of grinders. An emery board or nail file can also be used. This method is quiet but takes longer than using clippers or an electric nail grinder.
For nail trimming, choose a time when your dog is relaxed or even sleepy, such as after a meal or a period of activity. Collect your clippers or grinder, some dog treats, and something to control bleeding in case it occurs (see below for suggestions and more on bleeding). If necessary, find an assistant to help you hold your dog. Ensure that other pets aren't around and that your dog won't be distracted by activity outside nearby windows.
To trim your dog's nails, hold your dog's toe firmly but gently. While calmly praising your dog and/or offering a treat, hold your clippers so that they will cut the nail from top to bottom, not side to side. Then insert a very small length (no more than 1/16 inch) of nail through the trimmer's opening. Avoid cutting the quick, which is the pink area within each nail that contains nerves and blood vessels. Accidentally cutting the quick will cause pain and bleeding, probably causing your dog to yelp and struggle. This is a good time to stop trimming, but first apply styptic powder to the bleeding nail tip. Press the powder onto the nail tip to ensure that it sticks. If you don't have styptic powder, dab the tip of the nail on a bar of soap or in a little flour or corn-starch. If bleeding continues for more than a few minutes, call your veterinarian.
If your dog experiences discomfort or pain during nail trimming, you will probably have trouble trimming his or her nails in the future, so make sure that you keep the experience as pleasant as possible and clip just the tip of each nail. If your dog struggles, talk to him or her calmly. If this doesn't help, take a break and try trimming some nails later. Never punish your dog for not cooperating, and be sure to reward good behaviour with praise or a treat.
Some dogs become fearful or aggressive during nail trimming. Watch carefully for signs of distress, such as panting, drooling, trembling, whining, freezing, cowering, tail-tucking, growling, or snapping. If your dog will not accept nail trimming, do not force him or her to submit.