A small black dog chews on fingers .
A dog is playing
A small black dog chews on fingers.
A dog is playing
There is a dog who is nipping a human's fingers.  It is unclear whether he is mouthing, play biting, or nipping out of fear.
There is a dog who is nipping a human 's fingers . It is unclear whether he is mouthing , play biting , or nipping out of fear .