This expression refers to a dog chewing endlessly on a bone. It picks it clean.

这个表达指的是狗没完没了地啃骨头。啃得干干净净。

Some dogs chew and bite at their tail so much that they cause hair loss or even permanent damage.

有些狗咬自己的尾巴咬得太厉害了，以至于会导致脱毛甚至永久性损伤。

What kind of dog chews through wood?

什么狗 居然把木头给啃穿了？

SUE ANN PIEN: My dog chewed through literally-- this animal chewed through our DVD player.

SUE ANN PIEN：我的狗确实咀嚼了——这只动物咀嚼了我们的 DVD 播放机。