One unique feature of doggos over some other animals is the eyebrows they use to express things to us humans.
A muscle responsible for raising the inner eyebrow intensely is uniformly present in dogs but not in wolves. Behavioral data show that dogs also produce the eyebrow movement significantly more often and with higher intensity than wolves do, with highest-intensity movements produced exclusively by dogs.
Something that we've both had a silent agreement on, it works well for both our species, communicating emotion when it's often thought lacking.
Interestingly, this movement increases paedomorphism and resembles an expression humans produce when sad, so its production in dogs may trigger a nurturing response. We hypothesize that dogs’ expressive eyebrows are the result of selection based on humans’ preferences.
I am not so daft as to believe that feeling or emotion is the exact same feeling that us humans possess. But I do think that a dog does have worries and get sad, angry, frustrated, and happy, oh, so happy.
Personally, I think Millie is worried that we're going to forget that supper time is coming up in just under an hour and she's getting hongree!
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