Why Do Dogs Sleep with Their Eyes Open?

Ever caught your dog sleeping with an eye open?

It's a weird behavior most dog owners have seen before.

But are they really asleep?

Turns out there are a few explanations for dogs sleeping with their eyes open.

One is the existence of a third eyelid in dogs.

This can give the illusion that a dog is sleeping with an eye open.

Dogs also frequently sleep in a semi-alert state.

This instinctual behavior has been retained in the domestication from wolf to dog.

Swipe up to learn more about your dogs sleeping habits!