Ocular Discharge in Geese: Why Your Goose Has a Runny Eye

Ocular discharge means tears, mucus, or pus coming from one or both eyes. In geese, this may look like a watery eye, crusting on the eyelids, damp feathers below the eye, or thicker white, yellow, or tan material. Sometimes the problem is limited to the eye itself. In other cases, a runny eye is part of a larger respiratory or infectious illness.

The tissue around a bird's eye is delicate, so even mild irritation can cause redness, blinking, and drainage. Merck notes that eye discharge, swelling, redness, excessive blinking, or holding the eye closed should be evaluated promptly because conjunctivitis may be a local eye problem or a sign of wider respiratory disease. PetMD also notes that avian conjunctivitis can produce thick or crusted discharge and may follow infection, trauma, parasites, fungal disease, or vitamin A deficiency.

For pet parents, the key point is that a runny eye is not something to ignore. A goose that seems bright and active may still have a corneal scratch, foreign material under the eyelid, or an early infection. Early care often means fewer complications and a better chance of preserving comfort and vision.

The most common causes fall into a few categories. Irritation or trauma is high on the list. Dusty bedding, poor ventilation, ammonia buildup from wet litter, plant material, peck injuries, and scratches from fencing or debris can all inflame the conjunctiva or cornea. A goose may then tear excessively, blink, or keep the eye partly closed.

Infectious causes are also important. In birds, conjunctivitis may be triggered by bacterial, viral, fungal, or parasitic disease. PetMD lists bacteria such as Mycoplasma, E. coli, Staphylococcus, Pasteurella, and Chlamydia among possible causes of avian conjunctivitis. Merck notes that Mycoplasma gallisepticum infection can occur in geese and may cause conjunctivitis with frothy eyes and nasal discharge. In young goslings, Merck also describes waterfowl parvovirus as a cause of oculonasal exudates.

A runny eye can also be part of a respiratory or systemic disease rather than a primary eye problem. Merck notes that duck viral enteritis affects ducks, geese, and swans, and while classic signs often include sudden death and diarrhea, waterfowl disease outbreaks can involve ocular or nasal signs and require flock-level attention. During avian influenza outbreaks, VCA notes that birds may show conjunctivitis with eye discharge and redness along with respiratory signs.

Less obvious contributors include vitamin A deficiency, which can affect the tissues lining the eyes and respiratory tract, and poor flock hygiene that increases exposure to irritants and infectious organisms. Because several very different problems can look similar at home, your vet needs to sort out whether the discharge is from irritation, injury, local infection, or a broader flock disease.

Diagnosis starts with a hands-on exam and a close look at the eye, eyelids, nostrils, and breathing pattern. Your vet will usually ask when the discharge started, whether one or both eyes are affected, what bedding and water sources your goose uses, whether there has been contact with wild waterfowl, and whether any other birds are sick. Those details help separate a local eye problem from a contagious flock issue.

The eye exam may include checking for foreign material, eyelid injury, corneal scratches or ulcers, swelling behind the eye, and the character of the discharge. Depending on what your vet finds, they may recommend fluorescein stain to look for corneal damage, cytology or culture of discharge, and testing for respiratory or flock disease when nasal signs, multiple sick birds, or sudden deaths are present. In poultry and waterfowl cases, diagnostics may also include fecal or environmental review, bloodwork, or PCR testing through a diagnostic lab.

Because geese are flock animals, diagnosis is not always about one bird. If several birds are affected, your vet may advise isolation, flock history review, and biosecurity steps while test results are pending. That approach helps protect the rest of the flock and guides treatment choices more accurately than treating every runny eye the same way.

Prevention starts with the environment. Keep bedding clean and dry, reduce dust, and improve airflow so ammonia and moisture do not build up around the birds. Clean water sources regularly, and remove sharp debris, poky weeds, or damaged fencing that could injure the eye. Good nutrition matters too, because vitamin deficiencies can make the tissues of the eye and upper airway less healthy.

Biosecurity is especially important for geese and other waterfowl. Avoid sharing equipment between groups without cleaning it, quarantine new birds before introducing them, and limit contact with wild waterfowl and contaminated standing water when possible. Merck specifically advises avoiding direct or indirect contact with wild, free-flying waterfowl and contaminated material in the context of waterfowl viral disease.

Watch the flock closely for early signs such as tearing, blinking, nasal discharge, or reduced appetite. Prompt veterinary care for the first affected bird can sometimes prevent a larger flock problem. Routine wellness visits with your vet, especially if you keep mixed poultry species or have recurring respiratory issues, can also help you build a prevention plan that fits your setup.