Do Dogs Blink?
Dogs blink to clean their eyes. Not only does blinking remove surface debris such as irritants and dried tears, but it also moistens and nourishes the eyes. Blinking can also result from an external stimulus such as flashes of light or strong wind.
Beyond physiological responses, blinking is an indicator of some canine behavior. When dogs are focused and alert in certain environments, they strain their eyes and reduce their blinking. They maintain eye contact on the object of their unease until they feel safe. In contrast to that, they blink to intentionally portray amicable behavior. If you want to diffuse a nervous display from a dog, do not stare because dogs consider direct eye contact as a rude or confrontational action. Instead, blink more since they perceive it as a calming signal. Dogs also use blinking as a negotiating tool such as when trying to avoid trouble with other dogs and when trying to appease their owner.
Irregular blinking may be a symptom of discomfort or disease with your dog's eye or eyelid. This twitching is called blepharospasm and it is recommended that you consult your veterinarian to know the underlying problem that is causing it.