In adult dogs, tail-chasing every once in a while is "no big ... Do dogs wag their tails when happy? An expert unpacks your pup's behavior.

In some cases, dogs wag their tails quite aggressively and suffer from a painful consequence known as “happy tail” among vets - and one vet was keen to raise awareness about the affliction.

An curved arrow pointing right. A dog chasing its tail may be a sign of a direr issue. Like humans, dogs can suffer from a form of obsessive-compulsive disorder, called canine compulsive disorder.

If you’ve ever had the absolute pleasure of owning a pet, you might have often found yourself highly amused by their silly ...

She explains, “Happy tail syndrome shows an irony for both dogs and their owners. The behavior that expresses a dog’s joy becomes a source of pain and potential long-term health complications.

"We are like a dog chasing its tail, never quite catching it. The reason for this paradox is simple: we are looking for happiness in all the wrong places. Further, we cannot become happy.