Why does one of my dogs lick the other?
These dogs know and trust each other.
They also look out for each other: A dog who excessively licks the muzzle of his canine pal may be doing this because the dog has a tumor, cut or other medical need that requires attention and treatment.
Puppies also "kiss" their mothers, but it's not a gesture of affection.
Dogs also lick because they like the taste of an owner's salty skin and out of habit.
Mostly, with domestic Dogs, it's a sign of affection.
Licking releases pleasurable endorphins which gives Dogs a feeling of comfort and pleasure — like the feeling people get when they are biting their nails — it relieves stress.
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