Two Dogs meeting for the first time can size each
                                      other up without even a bark or growl. In a matter 
                                       of moments, with a series of glances and postures 
                             they know whether they're going to be buddies or enemies.
                                                                     DOGSPEAK
TEETH BARED, eyes staring, ears flattened forward, tail horizontal and wagging slowly, a low growl that originates in the chest and progresses to snarl-"Come closer and I might bite." (intimidation tactic)

YAWNING -"I need some alone time." (stress)

HEAD DOWN or turned to side-"You're the boss." (submissive gesture)

HEAD HIGH, tail up, body tensed and still-"Hey what's that?" or "Sure look me  over. I'll bet I can outrun you!" (conveys interest, or a challenge to another dog)

A LOW, assertive growl-"Get off my property!" (territoriality)

HEAD OR PAWS RESTING on another dog-"I'm the boss of you." (dominant gesture)

HEAD LOW, rump in the air, a light, high-pitched bark or soft play-growling-"C'mon. let's party! I've got the ball, see if you can take it from me!" (an invitation or playful challenge)

RAISING OF HAIRS along neck and/or back-"I'm ready to fight you." (threat posture)

TURNING AND HOPPING, with short, high-pitched yips or a happy howl-"Hi! It's a good to see you!" (excitement)

LOUD, repeated barking, sometimes with a growl-"Get away or I'll bite you!" (aggression)

SHORT, sharp barks or a low whine- "Danger!" or "Something's out there!" (alert)

LOW, moaning barking, with a low, whining growl "Who's out there?" (worry and anxiety)

ROLLING OVER, showing belly-"Don't hurt me, Boss." (deference posture)

LOOMING over another dog, tail wagging-"Because I said so." (dominant posture)

LONG, sustained howling-"Why did you leave me out there alone?" (separation anxiety)

A SCREAMING WHINE-"Uncle!" (when being beaten in fight by a dominant dog) or "Stop! It hurts!"

                                                             BROUGHT TO YOU BY CHEWY WOOF WOOF