Understanding Dog Tail Injuries And How They Happen Tail injuries often develop from regular vigorous wagging, accidental impacts against walls or furniture, and occasional bites or abrasions caused during play. In many cases, happy tail syndrome results from repeated trauma to the tail tip, causing splits, bleeding and ongoing irritation. https://orbitbridge54.shotblogs.com/yes-good-happy-tail-syndrome-treatment-do-exist-52519362