The sight of blood is frightening for many people, especially when an injured dog is bleeding. With quick first aid, the situation is not as scary. An injured pet is scared and in pain so be sure to take precautions to avoid being bitten. You may need to use a muzzle or have someone restrain your dog while you provide first aid. Keeping wounds covered with pressure to slow the bleeding is the first step. Minor injuries may be manageable at home, but larger wounds and internal bleeding require immediate veterinary care.