Importantly, DO NOT PANIC, your dog is highly likely to make a full recovery if treated promptly and correctly. It is important, where possible, to reduce the movement of your dog following a bite; ideally carry your dog or walk quietly back to your vehicle. Ring your nearest veterinary surgery to let us know what has happened and your estimated time of arrival. This enables us to be sure that we have a veterinary surgeon and nurse immediately available to see your dog, and we have had time to prepare our treatments before you arrive. If a bite goes unnoticed, but you see symptoms suggestive later in the day you must ring your vet without delay and seek veterinary attention, even if it is outside of normal opening hours.
Read more here