Aggressive

• Dog will try to make himself look bigger by getting on his toes, raising his hackles (area over the shoulders) and fur down the back

•  His ears may pin and eyes narrow

• Body will be stiff and tail out straight or slightly raised

• Teeth shown, with or without snarling

Fearful 

• Dog will cower and try to look smaller

• Ears will be pinned and he will try to avert his gaze

•  May or may not show teeth

• Tail may be tucked and dog may try to back away

• May or may not be shivering

Dominant

• Dog will be standing tall, with or without hackles raised.

• Mouth closed

• Ears up and forward, eyes wide

• Tail up and may be slowing wagging

Wants to play

• Ears forward and tail wagging

• Eyes bright and wide, mouth slightly open and may be panting excitedly

• Dog may be bouncing, play bowing and woofing/play growling.