If your dog has just been hit by a car or if he has other signs of a visible injury (bleeding, bone sticking out, etc. ), then you need to take him to a veterinarian right away. [2] X Research source

Your dog may also be avoiding walking at all if it hurts too much. If your dog is laying around more than is usual for him, then this can also indicate that something is wrong. Keep in mind that dogs may limp due to a broken bone in the leg, hips, or even the ribs. [3] X Research source  

You may need to muzzle your dog to prevent him from biting you or someone else in self-defense. Dogs may bite their owners if they are stressed or in pain. [5] X Research source

Try to keep your dog from moving around too much as you transport him to the veterinarian. You may want to place a blanket over him as well to keep him warm and help to prevent him from going into shock.

Fractures are classified as either complete or incomplete. A complete fracture is where the bone is separated in one or more places and an incomplete fracture is where the bone is bent and not fully separated. [9] X Trustworthy Source American College of Veterinary Surgeons Trade organization responsible for setting standards of surgical excellence for the field of veterinary medicine and promoting safe practices for equine care. Go to source

Get a crate that is large enough for your dog to stand up, turn around, and lay down in. Place some comfortable bedding in the crate, such as a couple of folded blankets or a dog bed. Do not leave your dog in the crate for more than a few hours at a time. You will need to let him out to go to the bathroom and to eat and drink as well. Never use a crate as punishment. Your dog should want to spend time in his crate, not fear it. [12] X Trustworthy Source The Humane Society of the United States National organization devoted to the promotion of animal welfare Go to source

For example, if you have a puppy, then he may fully recover in about one month. If you have an older dog, it can take much longer.