Short answer: To treat conjunctivitis (pink eye) in a dog, have your vet identify the cause first, then follow their plan — usually prescription eye drops or ointment — and at home gently wipe away discharge with a clean, damp cloth and keep irritants out of your dog's eyes. Most cases clear up within one to two weeks once treated. Conjunctivitis is rarely an emergency, but a red, goopy, or squinting eye should always be checked by a veterinarian, because the same signs can point to more serious problems like a corneal ulcer or glaucoma.
I'm Preston Smith, co-founder of Bully Sticks Central. We spend our days around dogs and dog owners, and eye trouble is one of the questions we hear most. Below is a plain, practical rundown of what conjunctivitis is, how it's treated, and what you can do at home to keep your dog comfortable while it heals.
What is conjunctivitis in dogs?
Conjunctivitis is inflammation of the conjunctiva — the pink, moist tissue that lines the eyelids and covers the white of the eye. When it gets irritated or infected, it swells and reddens, which is why people call it "pink eye." It can affect one eye or both, and it's fairly common in dogs of every age and breed.
What are the symptoms?
The tell-tale signs are redness and swelling around the eye, watery or thick discharge (clear, yellow, or green), squinting or blinking a lot, and pawing or rubbing at the eye. According to VCA Animal Hospitals, the discharge can range from a clear watery fluid to a sticky, pus-like mucus depending on the cause.
What causes it?
Common causes include allergies, bacterial or viral infections, and physical irritants like dust, pollen, smoke, or a foreign object such as a grass seed. It can also be secondary to dry eye, blocked tear ducts, or an eyelid problem. Because the causes are so different — and the treatments differ with them — guessing at home is a bad idea.
How do you treat conjunctivitis in dogs?
Treatment depends entirely on the cause, which is why the first step is a veterinary exam. The American Kennel Club and VCA both stress that you should never use human eye drops or leftover medication on a dog's eye without your vet's say-so — some human products can seriously damage a dog's eye.
Step 1: See your vet for a diagnosis
Your vet will examine the eye, often stain it to rule out a scratch or ulcer, and may test tear production. That exam tells them whether you're dealing with an infection, an allergy, or something mechanical — and points to the right treatment.
Step 2: Follow the prescribed treatment
For bacterial cases, vets typically prescribe antibiotic eye drops or ointment. Allergic conjunctivitis is often treated with anti-inflammatory or steroid drops plus removing the trigger. Irritant cases may just need a thorough flush and time. Whatever you're given, use it exactly as directed — consistency with dosage and timing is what clears the infection and stops it from bouncing back.
Step 3: Support healing at home
Alongside medication, gently wipe discharge away from the corner of the eye with a fresh, damp cotton pad or soft cloth, wiping outward and using a clean section for each eye. Keep your dog from rubbing or pawing — a recovery cone helps if they won't leave it alone. Give them a quiet, clean spot to rest, and steer clear of dusty trails, smoke, and other irritants until the eye is back to normal.
When should you see a vet right away?
Book a same-day visit if the eye is swollen shut, cloudy, bulging, or clearly painful, if there's heavy colored discharge, or if your dog is holding the eye shut and won't open it. These can signal a corneal ulcer, glaucoma, or a foreign body — problems that can threaten vision if they're not treated quickly. When in doubt, call your vet; eyes are one place where waiting rarely pays off.
Can diet and treats help your dog's eye health?
A healthy diet won't cure an active infection, but good overall nutrition supports your dog's immune system and long-term eye health. Foods and treats with vitamin A and antioxidants play a role in normal eye function. Just as important is what you keep out of your dog's diet — artificial additives and low-quality fillers do nothing for a recovering dog.
That's the whole idea behind what we make at Bully Sticks Central. Our chews are 100% natural, single-ingredient, 100% real meat, fully digestible, and contain no rawhide. They're ethically sourced from grass-fed American and Argentinean farms and 100% high-quality guaranteed. If you want to simplify what your dog eats, our guide to single-ingredient chews is a good place to start, and our bully sticks are a simple, clean everyday chew. If your dog is prone to gulping, our note on safe trachea treats is worth a read too.
The bottom line
Conjunctivitis in dogs is common and usually very treatable. Get a proper diagnosis, follow your vet's medication plan to the letter, keep the eye clean and the irritants away, and most dogs are back to bright, clear eyes within a couple of weeks. Feed them well while they heal, and call your vet promptly if anything looks worse rather than better.
This article is for general information and isn't a substitute for veterinary advice. Always consult your veterinarian about your dog's specific condition.
This post was last updated at July 23, 2026 05:52
