Doggie Demeanor suggests that adults and children should look for the following warning signs a dog might bite: The dog is avoiding eye contact The dog’s tail is tucked between his/her legs The dog is growling The dog is backing away The dog’s head is down The dog is showing his/her teeth The dog’s fur on the back or neck is raised The whites of the dog’s eyes are showing The dog is yawning or licking his/her lips The body of the dog is rigid or stiff, whether or not the dog’s tail is wagging