Many animals will show immediate improvement. Sometimes there is a 24-48 hour period of tiredness. Some animals require a few sessions to resolve acute pain. Often, with chronic health problems, the animal chiropractor will want to see your animal several times to maintain and re-establish normal function of the joints and nervous system. In the case of a recent injury or subluxation, one adjustment may be adequate but a follow-up is needed to assure your companion is well. When long term problems reach the point of noticeable pain or outward signs, the doctor may need to do several adjustments.