An animal in pain is more likely to bite. So muzzle it first with a scarf, belt, or towel, unless it’s vomiting. Get the animal off the road by gently sliding it onto a towel or blanket (these should be in your car's first-aid kit). Don't lift the animal. Make sure it’s warm, as it may be in shock. If it seems to have any broken bones, do your best to not move it too much.