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Why Are My Dog's Eyes Red?

Why Are My Dog's Eyes Red?

Just like people, our dogs' eyes get red when they become irritated. This irritation can be caused by a  number of things ranging from dry eyes to infections, foreign objects or eye injuries. Here, our Cordova vets explain the causes and treatments for your dog's irritated, red eyes and how you can help.

Our dogs' eyes work a lot like ours. They are active organs that are constantly adjusting themselves, working to transmit what your pup sees to their brain. Their eyes differ from ours in that they have a third eyelid, called the nictitating membrane, that is located in the corner of their eye.

As you have surely experienced with your own eyes, there are a whole host of things that may cause them to become irritated and noticeably red, from external irritants to excessive dryness and disease. Some breeds of dog are more susceptible to developing red, irritated eyes as well as the associated health issue.

Flat-faced breeds like Pugs, Bulldogs and Shih Tzus as well as breeds with long hair around their eyes like Sheepdogs, Maltese and Poodles can all be at greater risk of developing red eyes than other dogs. Likewise, older dogs will develop issues with their eyes causing them to become red more often, especially if they have pre-existing conditions like diabetes or high blood pressure.

What Are The Causes of my Dog's Red Eyes?

Noticeable redness in your dog's eyes generally indicates irritation and inflammation, which can be the result of many different eye health issues. The following are some of the most common health conditions that may be the reason your dog has red eyes.


Just like you may get watery eyes and a stuffed-up nose when allergy season rolls around, your dog can get red, weepy eyes and become uncomfortable from any number of allergies.

These may be seasonal to pollen or the like, or they may be to your pup's food. If you notice that your pooch has red eyes and is itchy or sneezing more often without seasonal patterns, bring them into your vet for allergy testing.

Eye Injury or Trauma

Injuries or physical trauma to your dog's eye can be a cause of red, irritated eyes ranging from quite mild to very serious. Your dog may have a hair or piece of grass stuck in their eye that is irritating surface tissues and causing them to become red and inflamed.

Your pup may also have a scratch, cut or another more serious abrasion that is difficult to detect. If you think that your dog has had a serious physical injury to their eye that is causing one or both of their eyes to become red, bring them into your vet as soon as you can.


This itchy inflammation of the eye is also called 'pink eye' and is relatively common in people. It affects the tissues covering your dog's eyes and generally only affects one eye at a given time.

This infection can be caused by environmental irritants, viruses or bacteria. Since it's unlikely that you know the reason for your pet's pink eye, make sure you bring them in to the vet for advice on how best to treat their irritated eyes.

Dry Eye Syndrome

Also known as keratoconjunctivitis sicca or KCS, this condition is caused by inadequacies in the moist film of tears that generally covers a healthy eye. When this film gets too thin, it allows your pup's eye to dry out and become inflamed.

One of the most common causes of this condition is an immune-mediated disease in dogs that causes their tear gland to stop functioning properly. Other internal health conditions like diabetes can also have an impact on your dog developing dry eyes.

Treating Red Eyes In Dogs

Don't start treating your dog's red eyes on your own without first consulting a vet.

Since red eyes are a symptom of a whole host of eye-related health issues, a veterinary examination will be required to determine the root cause of your pup's discomfort. Any attempts to treat your dog's condition without knowing what it actually is that you're treating likely won't help and may even worsen their condition.

That being said, some common treatments for health issues in your dog's eyes generally include medicinal, antibacterial or anti-inflammatory eye drops or ointments. Your vet will be sure to walk you through the best way to administer these treatments for your dog's red eyes to make sure they are as comfortable and effective as possible.

In more extreme cases, surgical intervention may be required, especially for issues like cherry eye.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding pets. For an accurate diagnosis of your pet's condition, please make an appointment with your vet.

Does your dog have red eyes and signs of discomfort? Contact Memphis Veterinary Specialists to book an appointment. Our vets will be able to examine, diagnose and plan an appropriate treatment to help your dog feel better.

From Happy Pet Owners

  • "My little guy had the best knowledgeable care, I felt very welcomed, and everyone was very generous. Thank you, MVS!”
    Kathy W.

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