My feet rejoice like the wagging tail of a dog waiting for its walk. My feet know they are safe.

我的双脚就像小狗等待散步时摆动起来的尾巴一样欢乐。我的脚知道它们自己很安全。

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The dog was biting, growling, and wagging its tail.

那条狗又咬又叫，摇着尾巴。

《柯林斯英汉双解大词典》

"And then I turn around and I see this little puppy dog looking up at me, wagging her tail,and uh, everything just left.I got calm.

VOA: special.2009.12.11

When humans blossomed from the evolutionary tree, it seems there was a cold wet nose and a wagging tail waiting for us.

CNN: Quest for man's best friend

The wolf is at the door, but he is wagging his tail.

NPR: Excerpt: 'All Art Is Propaganda'

In a typical case of tail wagging dog, says Mr de Waal, Azerbaijan sabotaged moves to reopen the border between Turkey and Armenia in 2009.

ECONOMIST: Nagorno-Karabakh's future