Broken nails can be painful and dangerous. Your dog can break his nails by merely walking or playing. Keeping those paws well groomed can help to prevent cracks and breaks.
When a nail does break it could potentially break a couple of different ways. Either it will spit, leaving an open nail and exposed quick, or it could snap at an angle. Both of these breaks could snag carpet, bedding, furniture, and even grass, causing more pain and bleeding.
Many toe injuries cause excessive bleeding and cleaning is imperative to inspect the entire paw and to assess and treat the injury.