Understanding Dog Tail Injuries and Why They Occur Tail injuries commonly occur from repetitive strong tail wagging, unintentional knocks against hard surfaces, and small cuts or grazes caused during play. In many cases, happy tail syndrome results from repeated trauma to the tail tip, causing splits, bleeding and ongoing irritation. https://smartsystem886.blogdemls.com/38375076/the-most-spoken-article-on-dog-tail-guard