When clipping the nails on a dog or cat with white toenails you can see the pink “quick”. This is where the blood vessels are found.  If the nails are accidentally trimmed too short, the quick will bleed.  This is nothing to be alarmed about. The bleeding can be stopped by packing the end of the toenail with flour, cornstarch or powder.  It will take a minute or two for the bleeding to stop.