Why Do Dogs Chase Their Tails? When It’s Play — and When It’s a Problem

Few things are funnier than a dog spinning after its own tail. But as I explained to The Indian Express: the real reason dogs chase their tails, this behaviour sits on a spectrum from harmless play to a genuine medical red flag.

When it’s completely normal

Puppies discover their tail the way babies discover their toes — it moves, so it must be chased! Occasional, brief tail-chasing in a young dog that stops on its own or when you call is nothing to worry about.

When it’s a message, not a game

1. Boredom and under-exercise

High-energy breeds stuck indoors invent their own entertainment. If tail-chasing spikes on days without walks, the fix is more physical and mental activity — sniff walks, puzzle feeding, training games.

2. Itch at the back end

The most common medical cause we find in the clinic: fleas, tapeworms, blocked anal glands or skin allergy around the tail base. The dog isn’t playing — it’s trying to reach an itch. Look for chewed fur, redness, or scooting.

3. Pain

Tail injuries, arthritis of the lower spine, or anal-gland infection can trigger sudden tail obsession in a dog that never did it before.

4. Compulsive behaviour

In some dogs (Bull Terriers and German Shepherds are famous for it), tail-chasing becomes a true compulsion — trance-like spinning that is hard to interrupt and sometimes ends in self-injury. This needs a proper behaviour plan, and occasionally medication.