Ears
Ear position relates the dog’s level of attention, and reaction, to a situation or animal. Erect ears facing forward means the dog is very attentive, while ears laid back suggests a negative, usually fearful, reaction.
Dogs with drop ears, like Beagles, can’t use these signals very well, as the signals first developed in wolves, whose ears are pricked. Wolf-like dogs will, when content and happy, often hold their ears in a horizontal position but still forward. This has been referred to as the "Wolf Smile"
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