As humans, we possess two eyelids that cover our eyes when we blink or close them. At first glance, it may appear that your canine possesses these same features, but take a closer look, and you’ll ...

Our family dog used to have a rather noticeable extra eyelid that became especially apparent when he dozed off, usually upturned on the rug. This is the fleshy curtain seen at the corner of each eye, ...

You can see this dog’s third eyelid in the corner of its eye. Shooty Photography/Shutterstock Our family dog used to have a rather noticeable extra eyelid that ...