What kind of dog is always bitten but never barks?

What kind of dog never what kind of dog never What kind of dog is always bitten but never barks? what kind of dog would preson bite? What kind of dog never bites? Dog is a kind of animals.Dog is a kind of animal.哪个对 what kind of party is What kind of dog doesn't bit or bark What kind of dog doesn't bite or bark? 谜语:what kind of dog doesn't bite or bark? 猜谜 what kind of dog doesn't bite or bark what kind of dog would a person bite What kind of dog doesn't bite or bark? 猜谜：What kind of dog never can bite and bark? What kind of dog people bite?是脑筋急转弯 what kind of dog never bites?猜谜语 what kind of dog never can bite and bark What kind of dog can never bite and back?_____