Domestication Might Have Sculpted Eyebrow Expressions in Dogs
"Dogs have stronger facial muscles compared to wolves, giving them the sad or “puppy dog eyes” look. Biologists who compared the facial muscles of dogs and wolves report that dogs have facial muscles that allow them to lift their inner eyebrows, making their eyes appear large or sad. The study suggests that the domestication of dogs by humans has led to this adaptation because humans may view dogs’ eyebrow expressions as an appeal for help". Full article HERE
Forum