In Depth Analysis: Do Dogs Eyes Change Color

Yes, a dog’s eye color can change, but most changes are normal: puppies’ eyes settle into their adult color within the first few months, and older dogs may develop a bluish-gray haze. A sudden change in color, cloudiness, redness or signs of pain is not normal and needs a prompt vet visit. Key Takeaways Puppies: blue-gray puppy eyes often darken to brown or another adult color within the first few months. Senior dogs: a bluish-gray haze is often nuclear sclerosis, a common, usually harmless aging change. Only a vet can tell it from cataracts. Not normal: sudden color change, cloudy or milky pupils, redness, discharge, squinting or pain. Act fast: glaucoma and some other eye problems can cause permanent vision loss within hours or days. This article is general information and not veterinary advice. See our Disclosure. What Determines a Dog’s Eye Color? As in people, eye color depends on the amount and distribution of melanin in the iris, the colored ring around the pupil. Genes set the starting color. More pigment gives darker brown eyes, less gives amber or yellow, and certain gene variants produce blue eyes, as seen in Siberian Huskies and some merle dogs. Breed, age, health conditions and some medications can all change how the eyes look over time. When Do Puppies’ Eyes Change Color? Puppies’ eyes open at about 2 weeks old and often look blue or gray at first because pigment has not developed yet. Over the next several weeks to a few months, pigment builds up and the eyes usually darken to their adult shade, commonly by about 4 months, though some take longer. Dogs that stay blue-eyed, such as Huskies and some Australian Shepherds, do so because of their genetics. Normal Changes vs. Warning Signs Usually normal See a vet promptly Puppy eyes darkening in the first months Sudden change in iris color at any age Slow, mild bluish-gray haze in a senior dog’s lens Milky white or cloudy pupil, or a bluish haze with a red, painful eye Slightly different colors in the two eyes if the dog has always had them One eye newly different from the other Gradual lightening of iris with age Redness, swelling, discharge, squinting, pawing at the eye or bumping into objects Age-Related Changes Many dogs over about 7 years develop nuclear sclerosis, a bluish-gray cloudiness of the lens that comes from normal aging. It usually doesn’t affect vision much. It is often mistaken for cataracts, which look whiter and denser and can impair sight. Only an eye exam can tell the two apart. See this overview of the aging canine eye. Health Problems That Change How the Eyes Look Cataracts: the lens turns cloudy, often with age, genetics or diabetes. Untreated, they can lead to blindness. Surgery is possible in many dogs. Glaucoma: raised eye pressure that can cause a bluish haze, a red or bulging eye and pain. It is an emergency. Uveitis and inflammation: from infection, injury, immune problems or disease. The eye may look red, cloudy or a different color. Corneal injury or ulcer: squinting, tearing and a hazy surface. Any of these needs veterinary diagnosis. Don’t wait to see whether it improves. How to Track Your Dog’s Eye Color at Home Set a baseline: once your dog is an adult, take clear photos in natural light. Check weekly: look at color, clarity and any redness or discharge. Keep notes: record dates and photos taken in the same lighting. Share with your vet: bring photos to checkups. See why annual wellness exams matter. Related reading: how long dogs live by breed and smart pet health monitors. Browse our pet shop for care supplies. Frequently Asked Questions At what age does a dog’s eye color change? Mostly in puppyhood. Blue-gray puppy eyes typically darken over the first few months and settle by about 4 months, sometimes later. Is it normal for an older dog’s eyes to look cloudy? A mild bluish-gray haze is common and often nuclear sclerosis, but cataracts and other diseases look similar. Have your vet confirm. What does a sudden eye color change mean? It can signal inflammation, injury, glaucoma or other disease. See a vet promptly. Can eye problems lead to blindness? Yes. Untreated glaucoma, cataracts and severe inflammation can cause permanent vision loss, so early treatment matters. Sources Today’s Veterinary Practice: The Aging Canine Eye Coats and Colors: Dog Eye Colors Last reviewed: November 2026. If your dog’s eyes change, look red or seem painful, contact a veterinarian.