#4 TAIL MOVEMENT
The way dogs use their tails can be misconstrued by people. A wagging tail can indicate either pure delight or a cautionary signal to stay away. The interpretation depends on the speed of the wagging and the posture of the dog’s body. When dogs are happy, they wag their tails with their entire body, whereas a stiff body and a tail moving rapidly from side to side could be a sign of agitation.