# Do Puppies' Eyes Change Color? What to Expect Yes, do puppies eyes change color? In most dogs, the answer is yes. Puppies are usually born with blue eyes, and those eyes gradually shift to their adult color over the first few months of life. Coat color can change too, so a puppy that looks one way at 8 weeks may look quite different at 6 months. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Most puppies start with blue eyes because melanin (the pigment that colors the eye) has not fully developed yet, and the true color usually settles by about 12 to 16 weeks of age. - Eye color changes are driven by pigment production in the iris, and the final color can be brown, amber, hazel, green, or stay blue depending on the dog's genetics. - Coat color often changes at the same time, especially in puppies born with a dark "puppy coat" that fades or shifts as the adult coat grows in. - A change in eye color that happens suddenly in an adult dog, or that comes with pain, cloudiness, or redness, is not normal and needs a veterinary exam. - You can track changes safely at home with monthly photos in the same lighting, and you should call your vet if you see squinting, discharge, or a color change in just one eye. ## What Puppy Eye Color Change Looks Like ### The normal timeline A newborn puppy's eyes are closed. They open at roughly 2 weeks of age, and at that point the eyes almost always look blue or gray-blue. This is not true blue pigment. It is the color you see when there is very little melanin in the iris yet. As the puppy grows, melanocytes (pigment-producing cells) in the iris begin to make melanin. The eye color darkens or shifts. Most of this change happens between 4 and 16 weeks of age. Some dogs finish earlier, some take a little longer. By the time a puppy is around 4 to 6 months old, the adult eye color is usually set. ### What is normal versus what is not Normal changes are gradual, happen in both eyes at roughly the same time, and do not come with pain or discharge. The eye stays clear and bright, the pupil responds to light, and the puppy is comfortable. Changes that are not normal include a sudden shift in eye color in an adult dog, a color change in only one eye, a cloudy or hazy cornea, a red or bloodshot eye, squinting, pawing at the face, or a swollen eye. These point to a problem inside the eye or on its surface, not to normal puppy development. If you notice redness or irritation, our guide on [why your dog's eyes are red](/knowledge/veterinary-medicine/symptom-guides/why-are-my-dogs-eyes-red) can help you sort out what you are seeing. ## Why Do Puppies' Eyes Change Color? ### Melanin is the main driver Eye color in dogs comes down to how much melanin is deposited in the iris and how it is distributed. Puppies are born with minimal iris pigment, which is why the newborn eye looks blue. As pigment cells mature, the iris takes on its adult shade. Melanin also affects how light interacts with tissue. In a study of 20 client-owned dogs, researchers used a colorimeter to measure melanin and erythema in different tissues. Each unit increase in the melanin index was linked to a 3.3% increase in laser light attenuation, which shows that melanin content measurably changes how tissue behaves [1]. The same pigment that changes eye color is the pigment that changes coat color. ### Genetics set the final color The genes a puppy inherits decide how much melanin the iris will hold and where it goes. Two puppies from the same litter can end up with different adult eye colors. A dog with a lot of iris pigment tends to have dark brown eyes. A dog with less pigment may have amber, hazel, or green eyes. Dogs with very little pigment, such as some merle or double-merle dogs, may keep blue eyes for life. Pigment research in other mammals supports the same basic pathway. In Rex rabbits, a protein called PMEL was found to be a major regulator of melanogenesis, and higher PMEL activity increased melanin content and boosted the expression of melanin-related genes [2]. Dogs use the same pigment machinery, even though the coat and eye colors differ. ### Do puppies' fur change color too? Yes, and often at the same time as the eyes. Many puppies are born with a soft, dark puppy coat that lightens, darkens, or shifts hue as the adult coat comes in. Breeds like Dalmatians, Golden Retrievers, and many terriers are famous for this. The change usually follows the same window as eye color, roughly the first 4 to 6 months, though some coats keep changing until the dog is a year old or more. Coat color is a pigment trait, so it follows the same melanin rules as eye color [2]. If your puppy's coat is thinning or changing in a way that looks like hair loss instead of a color shift, see our article on [dog hair loss after puppies](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-hair-loss-after-puppies). ## Main Causes of Eye Color Change Most eye color change in puppies is developmental. Some changes are caused by disease, injury, or pigment conditions. The table below separates the common, harmless causes from the ones that need a vet. | Cause | Typical clues | How urgent | |---|---|---| | Normal puppy maturation | Gradual shift from blue to adult color in both eyes, no pain, no discharge | Routine, no visit needed | | Genetics and breed | Predictable color for the breed, both eyes match, puppy is comfortable | Routine | | Congenital pigment conditions such as Nevus of Ota | Facial skin hyperpigmentation on one side since puppyhood, sometimes with iris hyperpigmentation | Schedule a vet visit, monitor closely | | Corneal injury or ulcer | Cloudy spot, squinting, tearing, pawing at the eye | Same day | | Uveitis or glaucoma | Red eye, pain, cloudy cornea, one eye larger, vision loss | Emergency | | Iris or ocular tumor | Color change in one eye, raised or dark spots on the iris, vision changes | Emergency or same day | | Corneal pigmented mass | Dark raised spot on the cornea, watery eye, history of eye injury | Same day to urgent | ### Congenital pigment conditions Some puppies are born with a pigment condition that affects the skin and eye on one side of the face. A 4-year-old German Shepherd was reported with facial skin hyperpigmentation on the right side since puppyhood, consistent with a congenital condition called Nevus of Ota, also known as (oculo)dermal melanocytosis. That dog later developed serious eye disease in the same eye, including diffuse iris hyperpigmentation and very high intraocular pressure [3]. This is rare, but it shows why one-sided pigment changes deserve a veterinary look instead of watchful waiting. ### Injury and corneal disease A scratch or ulcer on the cornea can leave a cloudy or pigmented spot that changes how the eye looks. In one case, a Golden Retriever that had injured her left cornea as a puppy later developed small spots of opacification on that same cornea, followed by a raised pigmented mass. The mass was diagnosed as a corneal pigmented squamous cell carcinoma [4]. A history of puppyhood eye injury is worth mentioning to your vet at every exam, because it can matter years later. ### Tumors of the iris and eye Iris tumors are uncommon in dogs but can change the appearance of the eye. A 16-year-old Shih Tzu was presented with progressive blindness and was found to have very high intraocular pressure in the right eye, along with iris thickening and an intraocular mass on ultrasound. Histopathology confirmed iridal melanoma [5]. Older dogs are more likely to develop these tumors, but any dog with a one-sided eye color change, a dark spot on the iris, or vision loss should be seen promptly. ## Red Flags That Make It an Emergency Call an emergency veterinary hospital right away if you see any of these: - A sudden change in eye color, especially in one eye only - A cloudy, blue-gray, or white haze over the cornea that appeared quickly - Squinting, holding the eye closed, or pawing at the face - A red, bloodshot eye, or a red or blood-tinged discharge - One eye that looks larger than the other - Bumping into objects, reluctance to go down stairs, or other signs of vision loss - A dark, raised spot on the iris or cornea that is new or growing Eye pain in dogs is easy to miss because dogs often hide it. Squinting and pawing are the clearest signs. If you are unsure whether discharge is normal, our guide on [dog eye goop color](/knowledge/veterinary-medicine/clinical-methods/dog-eye-goop-color) walks through what different colors can mean. ## What You Can Do at Home While You Wait You cannot change your puppy's eye color, and you should not try. What you can do is protect the eyes and gather good information for your vet. - Take clear photos of both eyes in natural light once a month. Note the date. This gives your vet a timeline. - Keep the face clean with a soft, damp cloth. Wipe from the inner corner outward, and use a fresh part of the cloth for each eye. - Do not use human eye drops, saline, or any leftover medication unless your vet prescribed it for this dog. - Prevent scratching and rubbing. A puppy with an irritated eye can make it worse fast. An Elizabethan collar can help if your dog keeps pawing. - Keep your puppy away from dusty areas, tall grass, and other dogs with eye discharge until your vet has seen the eye. - Write down what you see: which eye, when it started, whether it is getting better or worse, and any other symptoms. If the eye looks painful, do not wait for a scheduled appointment. Pain in the eye can worsen within hours. ## What Your Veterinarian Will Check Your vet will start with a full eye exam. That usually includes a Schirmer tear test to measure tear production, fluorescein stain to check for corneal ulcers, and tonometry to measure intraocular pressure. A slit lamp or magnifying loupe helps your vet look at the iris and the inside of the eye. If something looks abnormal, your vet may recommend: - A colorimeter or similar measurement of pigment and redness in the tissue, since melanin content affects how tissue responds to light and treatment [1] - Ocular ultrasound, which can show iris thickening and intraocular masses that cannot be seen from the outside [5] - A referral to a veterinary ophthalmologist for a detailed exam - Biopsy or removal of a mass if a tumor is suspected, as was done in the corneal tumor case [4] Your vet will also ask about your puppy's history, including any eye injury, any warts or skin growths, and any one-sided facial pigment changes since puppyhood [4][3]. That history often points to the right diagnosis. Treatment depends on the cause. Some conditions need topical medication, some need surgery, and some need monitoring only. Your veterinarian will calculate any medication dose from your dog's weight and health, so never guess at a dose on your own. ## Prevention and Monitoring You cannot prevent normal eye color change, and you should not want to. You can prevent some of the problems that cause abnormal changes. - Keep up with puppy vaccines and wellness visits so your vet can check the eyes at each appointment. - Protect the eyes during play. Avoid rough tug games near the face and keep puppies away from thorny plants. - Treat eye injuries seriously. Even a small scratch can leave lasting changes, as the corneal tumor case shows [4]. - Watch one-sided pigment changes closely. If your puppy has facial skin darkening on one side, ask your vet to examine both eyes at every visit [3]. - Know your breed's risks. Some breeds are more prone to pigment-related eye conditions, and your vet can tell you what to watch for. - Monitor older dogs too. Iris tumors are more common in older dogs, and a new dark spot on the iris should always be checked [5]. A simple monthly photo of your dog's face and eyes is one of the most useful things you can do. It turns a vague memory into a clear record. ## Limitations and When to Contact a Veterinarian This article covers the general pattern of eye and coat color change in puppies. Every dog is different, and individual cases need a veterinarian who can examine your pet in person. Contact your veterinarian the same day if you notice a new color change in one eye, a cloudy spot on the cornea, mild redness, or a small amount of discharge that does not clear up in a day. Go to an emergency clinic now if you see severe pain, squinting that will not stop, a bulging or enlarged eye, sudden blindness, a bloody eye, or a rapidly growing dark mass on the eye. Schedule a routine visit if the change is gradual, affects both eyes equally, and your puppy seems comfortable. Bring your photos and your notes. They help your vet decide whether the change is normal development or something that needs testing. ## Frequently Asked Questions ### How long does it take for a puppy's eyes to change color? Most puppies finish the shift by about 4 to 6 months of age, with the fastest changes happening between 4 and 16 weeks. Some dogs settle earlier and some take a bit longer. If the eyes are still changing after 6 months, mention it at your next wellness visit. ### Can a puppy's eyes change color more than once? Yes, the color can pass through several shades before it settles. A puppy may look blue, then gray, then amber, then brown. This is normal as melanin builds up in the iris. What is not normal is a sudden change in an adult dog or a change in only one eye. ### Do puppies' fur change color as they grow? Yes, coat color often changes during the same window as eye color. The soft puppy coat is replaced by the adult coat, and the color can lighten, darken, or shift. Some breeds keep changing for up to a year or more. ### Is it normal for one eye to be a different color than the other? Sometimes, yes. A condition called heterochromia gives some dogs two different eye colors, and it can be inherited. However, if the difference appears suddenly, or if the lighter eye is cloudy, painful, or red, that is not normal and needs a vet exam. ### When should I worry about my dog's eye color change? Worry when the change is sudden, affects only one eye, or comes with pain, redness, cloudiness, discharge, or vision loss. Gradual changes in both eyes of a young puppy are usually normal. When in doubt, a quick vet visit is the safest choice. If your dog has discharge along with the color change, our article on [dog eye discharge: clear vs. colored](/knowledge/veterinary-medicine/vet-visit-decisions/dog-eye-discharge-color-meaning) explains what different types can mean. For a broader look at eye discharge in dogs, see [eye goop in dogs](/knowledge/veterinary-medicine/clinical-methods/eye-goop-in-dogs). ## Related Articles - [Why Are My Dog's Eyes Red?](/knowledge/veterinary-medicine/symptom-guides/why-are-my-dogs-eyes-red) - [Dog Eye Goop Color](/knowledge/veterinary-medicine/clinical-methods/dog-eye-goop-color) - [Dog Eye Discharge: Clear vs. Colored, What It Means](/knowledge/veterinary-medicine/vet-visit-decisions/dog-eye-discharge-color-meaning) - [Dog Hair Loss After Puppies: Causes and What to Do](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-hair-loss-after-puppies) - [Eye Goop In Dogs](/knowledge/veterinary-medicine/clinical-methods/eye-goop-in-dogs) - [Dog Ear Infection with Discharge: What the Color Tells You](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/dog-ear-infection-with-discharge-what-the-color-tells-you) - [When Do Puppies Open Their Eyes and Ears?](/knowledge/veterinary-medicine/pet-care/when-do-puppies-open-eyes-ears) - [When Do Puppies Open Their Eyes? Timeline and Care](/knowledge/veterinary-medicine/pet-care/when-puppies-open-eyes) - [How to Tell If My Puppy Is Deaf or Blind: Early Signs](/knowledge/veterinary-medicine/symptom-guides/tell-if-puppy-deaf-blind) ## References 1. [Use of a colorimeter is a viable method to measure melanin and erythema content in the context of laser beam attenuation by use of a class IV laser in different tissues in dogs](https://pubmed.ncbi.nlm.nih.gov/36884382/). Journal of the American Veterinary Medical Association, 2023. 2. [Integrative Transcriptomic and Proteomic Profiling Identifies PMEL as a Critical Regulator of Melanogenesis in Rex Rabbits](https://pubmed.ncbi.nlm.nih.gov/41227465/). Animals : an open access journal from MDPI, 2025. 3. [Uveal melanoma associated with Nevus of Ota in a German Shepherd dog](https://pubmed.ncbi.nlm.nih.gov/41814890/). Australian veterinary journal, 2026. 4. [Primary corneal pigmented squamous cell carcinoma with concurrent canine papillomavirus type 17 infection in a dog](https://pubmed.ncbi.nlm.nih.gov/39933247/). New Zealand veterinary journal, 2025. 5. [Iridal melanoma in the right eye of a dog: A rare case from Chonburi, Thailand](https://pubmed.ncbi.nlm.nih.gov/41630768/). Open veterinary journal, 2025. ## Further Reading - [Merck Veterinary Manual: Dog Owners](https://www.merckvetmanual.com/dog-owners) - [Cornell Richard P. Riney Canine Health Center: Canine Health Information](https://www.vet.cornell.edu/departments-centers-and-institutes/riney-canine-health-center/canine-health-information) - [American Veterinary Medical Association: Pet Care](https://www.avma.org/resources-tools/pet-owners/petcare)