Aggressive - this is often based in fear and the dog is trying to drive something bothering him away.
This dog is not happy with the presence of something. He is not dominant! Do not challenge him! Just back off!!!
Dog will try to make himself look big - hair on back and shoulders raised and he will be up on his toes
Ears will be pinned back and eyes narrowed
Body will be stiff and tail out straight or raised up slightly
Teeth will be shown with or without snarling
Could be a precusor to a lunge if you do not back off.
Aroused/Alert - Something is going on, caught his attention and he is
probably determining what to do next.
Dog will be standing or sitting up tall with or without hair on shoulders raised
Ears erect and forward and eyes wide
May be woofing or growling
Tail raised high and may be slowly wagging
Dog will cower down and try to look smaller
Ears will be pinned and eyes averting gaze
May show teeth
Tail will be tucked and dog may back away
Dog may be shivering
He may growl while backing away, may show teeth
Extremely fearful dogs may cower and slink
Mildy worried dogs may look confused, eyes wider (whites showing)
Happy/Wanting to play
Ears will be pricked forward and tail wagging
Eyes will be bright and happy and mouth open slightly but teeth covered and dog may be panting excitedly
Dog may be bouncy, circling, yipping, mock growling
Dog may play-bow (lower front end with tail high in the air and wagging)
This dog will just look "chill."
His ears will be relaxed, mouth slightly open
Tail will be hanging and wagging in a relaxed manner (normal tail carriage
for the dog, not pitched high overback or tucked - unless the dog is one with a tail that normally arches over his back)