Some dogs turn on the aggression at the mere sight of ANY other dog, even a familiar pack mate when approached off their territory. (thesprucepets.com)
And the best pack mate for our other two dogs. (beachpets.com)
Dog incisors (the front teeth) are an effective comb; the little nibbles they etch on the bodies of pack mates stimulate the skin and have a calming effect. (canismajor.com)