Guide to Choosing Dog Food for Tear Stains

Eye HealthQ&AMeongsiljang Veterinary Advisory Board

If your dog has severe tear stains, start by checking their food ingredients. We’ve compiled veterinary-backed guidance on how to choose tear-stain-reducing dog food, compare key ingredients, and manage tear stains effectively.

Can Dog Food Reduce Tear Stains?

A white puppy with tear stains sitting in front of its food bowl

Puppy tear-stain dog food is a functional diet formulated to reduce ingredients that may trigger allergies and artificial additives. Some experts believe that adjusting the diet can help, as allergic or hypersensitivity reactions to specific ingredients in dog food can cause conjunctivitis and increase tear production. However, veterinary textbooks do not provide clear clinical evidence that specific ingredients in dog food directly stimulate tear production and worsen tear stains. If an allergy is suspected, you may try switching to a low-allergen protein or additive-free diet, but it is difficult to claim that this will be effective for all dogs. It is important to consult with a veterinarian to first identify the underlying cause. The causes of tear stains vary and include not only dietary factors but also anatomical issues such as nasolacrimal duct structure and irritation from facial hair. In this article, we will explore the causes and corresponding management strategies.

Understanding the Causes of Tear Stains

Tear stains occur when fur remains damp for extended periods due to tears or saliva, allowing porphyrin pigments in these fluids and bacterial activity to turn the hair brown or reddish-brown. The longer the fur stays wet from excessive tearing, the more severe the staining becomes. There are three main causes.

Dietary factors: Some experts suggest that allergies or sensitivities to certain ingredients in dog food can trigger conjunctivitis, leading to increased tear production. However, this link is not clearly established in veterinary textbooks, varies significantly among individual dogs, and does not apply to all dogs.

Anatomical factors: Small breeds with abundant hair around the inner corners of the eyes, such as Maltese, Shih Tzus, and Poodles, tend to have their facial hair wick tears away from the eye. If the nasolacrimal duct (the passage that drains tears into the nose) is narrow or blocked, tears are even more likely to run down the face.

Environmental and health factors: Environmental irritants like dust and pollen, infections around the eyes, or entropion (a condition where the eyelid rolls inward, causing eyelashes or hair to rub against the cornea) can also cause excessive tearing.

Ingredients That Cause Tear Stains vs. Beneficial Ingredients

When reviewing a pet food ingredient list, keep the following guidelines in mind to help you make the best choice.

Category	Ingredients to Avoid	Beneficial Ingredients
Protein	By-products, mixed protein sources	Single animal protein (salmon, duck, lamb)
Grains	Wheat, corn, soybeans	Sweet potato, potato, oats
Additives	Artificial colors, BHA, BHT	Natural preservatives (tocopherols, rosemary extract)
Functional Ingredients	—	Omega-3 fatty acids, probiotics

4 Criteria for Choosing Dog Food for Tear Stains

Single Animal Protein: Choose a diet that contains only one type of animal protein, such as salmon, duck, or lamb. When multiple proteins are mixed, it becomes difficult to identify which specific ingredient is causing the issue.

Low-Irritation Carbohydrate Sources: Opt for products that use sweet potatoes or potatoes as carbohydrate sources instead of wheat, corn, or soy. If you suspect a grain allergy, consider grain-free diets as well.

No Artificial Additives: Select foods free from artificial colors and chemical preservatives. The key is to carefully review the entire ingredient list, paying close attention to the items listed at the end.

Contains Omega-3 Fatty Acids: Omega-3 fatty acids may help regulate overall inflammation. You can choose diets that include salmon oil or flaxseed oil; however, we recommend consulting with your veterinarian to individually assess their direct effectiveness on tear stains.

An illustration showing the premium ingredients of pet food, displayed alongside natural materials.

Cases Where Diet Alone Is Not Enough

If there’s no improvement in tear staining even after allowing sufficient time for the diet change to take effect, it could indicate a structural issue such as a blocked nasolacrimal duct or an eyelid abnormality. In such cases, a veterinary examination is essential. If the tears appear yellowish or the discharge is thick and sticky, an infection may be present, making prompt veterinary care crucial.

How to Transition to New Dog Food

Sudden changes in diet can cause digestive issues, so it’s important to transition gradually over 7 to 10 days.

Days 1–3: 75% current food + 25% new food

Days 4–6: 50% current food + 50% new food

Days 7–9: 25% current food + 75% new food

Day 10 onward: 100% new food

Changes in tear staining after switching food may take some time to become noticeable, as it requires time for new fur to grow. Existing stains will gradually fade as new hair grows in, so avoid making hasty judgments and instead monitor the progress while consulting with your veterinarian.

An illustration showing the stages of transitioning to a new pet food

Care Tips to Use Alongside Diet

Combining these care tips with proper food selection can enhance the improvement of tear stains.

Eye Area Cleaning: Gently wipe the tear-stained areas 1–2 times daily with warm water or a specialized eye cleanser. The key is to clean the area before the tears have a chance to dry.

Hydration Management: Always provide plenty of fresh, clean water, as this supports overall health. While veterinary textbooks do not confirm a direct link between tap water minerals and tear stains, ensuring access to clean water remains a fundamental care principle.

Eye Area Grooming: Long hair around the eyes can directly irritate the cornea, leading to increased tearing. Keep the hair around the eyes trimmed short on a regular basis.

Probiotic Supplementation: Improving gut health can positively impact skin and eye health. Consult your veterinarian before considering probiotic supplements.

An illustration of a white puppy having its eyes cleaned.

Do Not Use Tear Stain Removers Carelessly

Some tear-stain removers available on the market contain antibiotic ingredients (such as tylosin). Prolonged use without a veterinarian’s prescription can lead to antibiotic-resistant bacteria. Additionally, removers containing bleaching agents may irritate the skin around the eyes. Always consult your veterinarian before using any tear-stain remover.

Breeds Particularly Prone to Severe Tear Stains

According to veterinary ophthalmology textbooks, certain breeds are more prone to tear staining due to their facial structure.

Maltese: As a small breed with white coats, tear stains are highly visible. They also frequently have narrow nasolacrimal ducts.

Shih Tzu: This small breed has abundant hair around the inner corners of the eyes, which can wick tears onto the face like a wick, making tear overflow more likely.

Poodle: Their abundant periocular hair can irritate the eyes, and impaired drainage through the nasolacrimal ducts has been reported, often leading to increased tearing.

Bichon Frise: Like the Maltese, their white coats make tear stains particularly noticeable.

For these breeds, it is especially important to establish a routine that includes proper diet management, regular cleaning around the eyes, and grooming of the hair around the eyes.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Are grain-free diets always good for tear stains?

Not necessarily. If a grain allergy is causing conjunctivitis and increased tear production, a grain-free diet may help, but this doesn’t apply to all dogs. It’s important to work with your veterinarian to identify the cause of tear staining before choosing a diet.

How quickly will tear stains decrease after changing your pet’s food?

It can take quite a while for tear stains to improve after switching to a new diet, as it requires time for new fur to grow in. Since existing stains will gradually fade as fresh hair replaces the old, avoid making hasty judgments. Because individual responses vary significantly, it’s best to monitor your pet’s progress in consultation with your veterinarian.

Should I take my pet to the vet if its tear stains are brown?

Brown or reddish-brown tear stains occur when pigments in the tears stain the fur, and they usually don’t pose an immediate health threat. However, if you notice yellow or green discharge, or if the eyes appear red or swollen, it could indicate an infection, so please consult your veterinarian.

Will giving filtered water instead of tap water make a difference?

Veterinary textbooks do not support a direct link between tap water minerals and tear stains. However, always providing fresh, clean water is a fundamental aspect of overall health care. To improve tear stains, it is more effective to combine dietary adjustments with proper care around the eyes.

Do supplements marketed for reducing tear stains in dogs actually work?

Omega-3 fatty acids and probiotics can help regulate inflammation and improve gut health. However, supplements alone are unlikely to completely eliminate tear stains; you’ll need to combine them with dietary adjustments and proper eye care for best results. Always consult your veterinarian before starting any new supplement.