 When a congenital condition is identified in a puppy, it may be the case that surgery is not possible until the animal is physically mature; during the period preceding the surgery, hydrotherapy can be employed to maintain the dog's condition.Spinal injuries or surgery can cause impairment of motor function, which may be treated by allowing the dog to exercise in water; it provides support and allows the dog to exercise its muscles while nerve regeneration is taking place.Degenerative conditions can make normal weight bearing exercise difficult and pressure on joints and limbs may aggravate some conditions, so hydrotherapy can be used in these cases to allow the dog to exercise in an environment where there is no pressure on the affected areas.