Natural - unthinking; prompted by (or like by) intuition; "a cat's natural aversion to water"; "giving to help was as instinctive as respiration" In some cases anal glands get backed up with oils, and dogs will attempt to empty them by dragging, or "scooting," their rear ands throughout the ground. https://cannabisintoxication20630.ziblogs.com/35868531/facts-about-healthy-dog-mobility-revealed