Do Dogs Have Eyebrows?
Some dog breeds have pigmented markings that look like eyebrows but they do not have eyebrows as humans do. The eyebrows' main function is to keep sweat and other moisture from reaching the eyes. Since dogs' fur covers most of their body and dog don't sweat under their fur, they don't need eyebrows although they do have a ridge above their eyes where their fur may be thicker. Dogs that appear to have eyebrows because of special marking include Rottweilers, German shepherds, and Doberman pinschers.
A secondary function of eyebrows in humans is conveying emotions. Although dogs have been found able to move the facial muscles over their eyes, no research has been able to establish that they are using their "eyebrows" specifically to communicate how they feel. There has been research that show that dogs move their "eyebrows" mostly only in the presence of humans.
Statistics also show that dogs in pounds and shelters that are able to move their faces such that they appear to raise their eyebrows are rehomed much quicker.