"Why are my dog's eyes red?" If you're asking, it might be time for a visit to the veterinarian. Red eyes usually indicate an underlying health problem — and the sooner it's treated, the better.
Read on to learn common causes of red eyes in dogs, what other signs to look out for and how your vet might treat your dog's eyes.
Why Are My Dog's Eyes Red?
Have you noticed that your dog's eyes appear bloodshot? Your dog's eyes could be red for a number of reasons. Here are some of the most common causes:
Irritation
If a foreign object, such as dirt, dust, grass or hair gets in your dog's eye, it can cause irritation and redness. Cleaning sprays and perfume can also irritate your dog's eyes.
Signs of irritation:
- Redness
- Tears or watery discharge
- Itchy eyes (expressed by pawing at their eyes or rubbing their face)
Treatment: You should contact your veterinarian first before any applying any treatment. They may suggest to gently wash out your dog's eyes with lukewarm water. Wait an hour or two to see whether the redness clears up.
Allergies
Just like people, dogs can have allergies, too. They can have seasonal allergies and food allergies, as well as allergic reactions to dust, mold, household cleaners and other environmental allergens. Any of these allergies can cause a dog's eyes to turn bloodshot, says the American Kennel Club.
Signs of Allergies:
- Redness
- Tears or watery discharge
- Itchiness
- Licking and scratching
- Sneezing
- Red or inflamed skin
- Hair loss
Treatment: Don't give your dog over-the-counter allergy medicine or eye drops without first consulting your veterinarian. Proper treatment depends on your dog's specific allergy, which your vet will determine by examining your dog and running tests. In some cases, pinpointing allergens can be a long process, especially if your vet suspects a food allergy (12-week food trials are required to properly diagnose food allergies).
Pink Eye
Pink eye, the common name for conjunctivitis, comes in two forms: infectious and non-infectious. Infectious pink eye is caused by a virus or bacterial infection, while the non-infectious type is generally caused by allergies, irritation, injury, a congenital condition or an illness such as distemper.
Signs of Pink Eye:
- Red or puffy eyes
- Itchy eyes
- Eye discharge
- Eyelids sticking together, squinting
- Swelling of the eyelid lining (conjunctiva)
Treatment: Whether or not your dog's case of pink eye is infectious, it needs to be checked out and treated by a vet. They'll determine whether it's the contagious type before determining and treating an underlying cause. Infectious pink eye must be treated with antibacterial or antifungal medicine. Your vet may also give you anti-inflammatory medicine to administer to your dog.
Dry Eye
Another issue that might cause you to wonder why your dog's eyes are red is dry eye, the common term for keratoconjunctivitis sicca (KCS). This condition occurs when the tear glands don't produce enough moisture, causing the tissues of the eye to dry out, says Cuteness. Dry eye can be a result of eye trauma, an underlying health condition or a corneal ulcer.
Signs of Dry Eye:
- Redness
- Itchy, painful eyes
- Thick discharge
Treatment: Your vet will conduct a test to assess the level of moisture your dog's tear glands are producing. They may also check for corneal ulcers. Dogs with dry eye are commonly prescribed eye drops to keep their eyes moist. You'll need to clean their eyes on a regular basis. While dry eye sometimes clears up on its own, it can also be chronic and require lifelong treatment.
Tasty Tips
Glaucoma
Glaucoma is a painful condition caused by fluid buildup that creates swelling and pressure, leading to damage of the optic nerve. If left untreated, glaucoma can lead to blindness.
Signs of Glaucoma:
- Redness
- Pain
- Swollen eyes
- Receding eyeballs
- Cloudy appearance
- Dilated and unresponsive pupils
- Poor vision
Treatment: If your dog shows signs of glaucoma, bring them to the vet immediately. If you manage to catch the condition early enough, there's a better chance that topical medicine or laser surgery will be effective and that your dog's vision can be saved, says Cuteness. In more severe cases, surgery may be required to relieve pain caused by fluid buildup and pressure. In the most severe cases, surgical removal of one or both eyes may be required.
In addition to the causes listed above, red eyes in dogs can be a sign of an illness, such as distemper, or a chronic health condition like diabetes or hyperthyroidism. Red eyes can also indicate a tumor or certain types of cancer. Some dog breeds are more prone to eye problems than others, says Rover.com. This includes flat-faced breeds like pugs and bulldogs, as well as long-haired breeds whose hair can irritate or damage their eyes. Dogs also become more prone to eye problems and underlying health conditions that can cause eye redness as they age.
How to Help Your Dog and When to Call the Vet
When you first notice your dog's red or itchy eyes, you can wait a couple of hours to see if they clear up on their own. If your dog allows it you can check their eyes and around their eyelids to see if there is anything in it that might be causing the problem. For minor irritations like a loose hair, a lukewarm wet paper towel can do the trick for cleaning around the eyelids. If that doesn't clear up the red eye, call your vet to ask for guidance. If allergies are suspected, your vet might give the go-ahead to give your dog an over-the-counter antihistamine. They can also let you know whether you should bring in your dog for an examination.
Visiting the Vet: What to Expect
When you take your dog to the vet to have their red eyes examined, your vet will likely ask about your pet's recent activity, daily habits and health history. They'll conduct an eye exam and may draw blood to check for underlying health conditions. If allergies are suspected, the vet may ask about your dog's environment, including whether or not you someone in your household smokes, the household cleaners you use and the food you feed your dog. With your cooperation, your vet will be better able to determine the source of the redness, provide appropriate treatment and give you instructions on how to care for your pooch at home.
Dogs are precious and so is their eyesight. If you're curious as to the reason why your dog's eyes are red, it's best to contact your vet.
Related products
Hill's Science Diet Adult 7+ Perfect Digestion Chicken, Whole Oats & Brown Rice Recipe Dog Food
Science Diet's breakthrough nutrition supports ultimate digestive well-being & healthy microbiome for dogs age 7+
Hill's Science Diet Sensitive Stomach & Skin Can Variety Pack
Hill's Science Diet Sensitive Stomach & Skin Variety Pack
Hill's Science Diet Adult 7+ Chicken Meal, Barley & Rice Recipe Dog Food
Supports energy level and beautiful coat in mature dogs
Hill's Science Diet Adult No Corn, Wheat, Soy Chicken & Brown Rice Recipe dog food
Supports healthy immune system, digestion, lean muscle & beautiful coat
Hill's Science Diet Puppy Lamb Meal & Brown Rice Recipe
Vital nutrients to support 5 essential building blocks for lifelong health
Hill's Science Diet Adult Chicken & Barley Recipe Dog Food
Supports lean muscle and beautiful coat for adult dogs
Hill's Science Diet Adult 7+ Small Paws Chicken & Barley Entrée Dog Food
A delicious complement to the nutrition of Science Diet Small Paws 7+ dry dog food
null Hill's Science Diet Adult Healthy Cuisine Hearty Beef, Carrots & Peas Stew Dog Food
Delicious braised beef paired with tender vegetables in a succulent stew
Hill's Science Diet Adult Perfect Digestion Chicken & Rice Entrée Dog Food
Science Diet's breakthrough nutrition supports ultimate digestive well-being & healthy microbiome
Hill's Science Diet Adult Turkey & Barley Dog Food
Turkey & Barley recipe with precisely balanced nutrition to keep adult dogs active and healthy
Hill's Science Diet Adult Lamb Meal & Brown Rice Recipe Dog Food
Supports lean muscle and beautiful coat for adult dogs
Hill's Science Diet Adult Salmon & Barley Entrée Dog Food
Supports healthy immune system, digestion, lean muscle & beautiful coat
Hill's Science Diet Adult Light Chicken Meal & Barley Recipe Dog Food
Fewer calories for less active dogs
Hill's Science Diet Adult Sensitive Stomach & Skin Chicken & Vegetable Entrée dog food
Supports digestive health, nourishes skin and promotes a lustrous coat
Hill's Science Diet Adult Large Breed Lamb Meal & Brown Rice Recipe Dog Food
Supports healthy joints, lean muscle, and beautiful coat for large breed dogs
Hill's Science Diet Adult Perfect Weight & Joint Support Hearty Vegetables and Tuna Stew Dog Food
Hill's Science Diet Adult Light Large Breed Chicken Meal & Barley Recipe Dog Food
Fewer calories for less active large breed dogs
Hill's Science Diet Adult Small & Mini Savory Stew with Beef & Vegetables Dog Food
A delicious complement to the nutrition of Science Diet Small Paws dry dog food
Hill's Science Diet Adult Light with Liver Dog Food
Low calories & L-Carnitine help promote ideal body weight, support healthy mobility & maintain heart function
Hill's Science Diet Adult 7+ Senior Vitality Chicken & Vegetable Stew Dog Food
Improves Everyday Ability to Get Up & Go
Related articles
Helping Your Puppy Behave While Eating
Learn how to help your puppy learn good behaviors by starting with proper table manners. Follow these helpful feeding tips.
Pneumonia in Dogs: Types, Clinical Signs, Treatment & Prevention
Pneumonia in Dogs: Types, Symptoms, & Treatment
10 Tips to Prepare for Adopting a Dog
Adopting a dog can be overwhelming if you simply don't know where to begin. Learn about ten things you should do to ensure a smooth, and fun, transition.
Tips for Helping Senior & Older Dogs in Winter & Snow
Learn how to help senior dogs navigate cold winters and snowy weather, including how long to leave them outside & walking tips.
Heartworms in Dogs: What You Need to Know
Learn the facts about what heartworms really are, symptoms & signs he might exhibit if he's infected, and treatment options to help him get rid of them.
What Happens When a Dog Drinks Alcohol?
Learn what happens when a dog drinks alcohol, how serious alcohol can be for his health, and the steps to take if your pup ever sneaks a sip.
Key Tips to Keep Your Puppy Fit & Healthy
Keep your new puppy in great shape by following our healthy puppy tips, including information about exercise, nutrition, and eating habits.
How Proper Dog Oral Care Leads to Healthy Dog Teeth
Are you paying enough attention to dog oral care? Learn some great ways to keep your dog's teeth & gums healthy, including a guide for brushing his teeth.
Diabetes in Dogs: What You Need to Know
Learn what diabetes mellitus is and what causes it in dogs. Learn the symptoms of diabetes and treatment options if you find out your dog is diagnosed.
IVDD / Intervertebral Disc Disease in Dogs: Symptoms, Diagnosis, Treatment & More
Learn about intervertebral disc disease in dogs, including info on which breeds commonly get IVDD, typical signs, treatment options & prevention tips.
Why Do Female Dogs Hump Things?
Why do female dogs hump things? Learn the reasons behind this curious behavior and ways you can help curb her mounting habits.
Can Dogs Be Ticklish? (& Where Are Their Spots?)
Learn whether your dog is ticklish, how to recognize if they are & which spots are most sensitive, as well as how to tell if they don't like being tickled.
Best Dog Breeds for Hot Weather
If you live in a warm area and are thinking of adopting a dog, you might be wondering "what are the best dog breeds for hot weather?"
Preventing Growth Disorders in Dogs
Reduce the chances of your puppy developing a growth disorder by discovering the issues that cause this dog disease and taking steps to combat it.
Tips for Keeping Your Dog Safe Outside
Learn the dangers of leaving your dog outside by himself, such as extreme heat or cold weather, and what you can do to help keep him safe.
Can My Dog Eat Pizza?
Learn whether it's safe to share a slice of pizza with your dog, which ingredients can cause health issues, and how much is a concern if he does eat some.
Liver Disease in Dogs: Facts That Dog Parents Should Know
Learn the facts about liver disease in dogs, such as how to spot symptoms, what causes it, treatment options & how nutrition impacts liver health.
Dogs and Fireworks: How to Help Your Frightened Pooch
Does your dog struggle with the loud noises from fireworks? Read information about canine noise anxiety, and get tips on how to help them cope.
Arthritis in Dogs: What You Need to Know
As your dog ages, arthritis and joint pain can become more common. Learn what causes these issues, signs to look out for, and treatments options.
Dog Nipping & Puppy Play Biting
Discover why dog nipping is such a common behavior, even among the best behaved pups, as well as how to get your puppy to stop nipping.
Put your dog on a diet without them knowing
Our low calorie formula helps you control your dog's weight. It's packed with high-quality protein for building lean muscles, and made with purposeful ingredients for a flavorful, nutritious meal. Clinically proven antioxidants, Vitamin C+E, help promote a healthy immune system.
Put your dog on a diet without them knowing
Our low calorie formula helps you control your dog's weight. It's packed with high-quality protein for building lean muscles, and made with purposeful ingredients for a flavorful, nutritious meal. Clinically proven antioxidants, Vitamin C+E, help promote a healthy immune system.