Occasionally, nails can be quicked as a result of the grooming process. The quick is a small nerve inside the toenail that nourishes the nail shaft so it will be healthy and grow. After nails are cut, pets can either wear away some of that nail due to their normal activity running about on pavement or in normal wear and tear. Then, the quick is exposed and can bleed. Just like if you get a paper cut or cut your own nails too short. If the nail starts to bleed, you can use a small amount of styptic powder (which is found in your pet supply store) and hold it to the nail for 15 seconds. Otherwise, you can use household cornstarch or flour.