The tail should be straight out and wagging a bit.

She stood looking up at the door handle, her tail wagging.

It all seems a case of the tail wagging the dog.

At first it felt like the tail wagging the dog.

Isn't it time to stop the tail wagging the dog!

Perhaps, since free agency, the tail is now wagging the dog.

And the tails of the world Wagged, happy that it had been given a voice.

One feels sometimes that the tail is wagging the dog.

But it feels a little bit like the tail wagging the dog.

Though it probably wasn't good for him, his tail wagged in approval the whole time.