In a well-lit area, look at your dog’s eyes. Their eyes should appear clear with equal-sized pupils. The area around the eyeball should be white. The next step may be a bit challenging but is just as important. Using your thumb (with freshly washed hands), gently roll down your pet's lower eyelid to have a look at it. If it is pink, then things are good. If it is red or white, you may want to book an appointment with your vet to have a closer look. A fun fact about cats and dogs, is that they have a third eyelid. This can range from whitish to pinkish and it protects their eyes from scratches. Some dog breeds are more prone to cherry eye (which is their third eyelid falling out of place). It is not a life-threatening condition and can be corrected with surgery.