Eye & Vision Issues in Gerbils

Eye issues in gerbils are common and are often linked to either environmental irritation or as a secondary sign of stress or illness. Healthy gerbil eyes should be bright, clear, and free of any discharge. Any deviation from this, such as redness, swelling, or crustiness, warrants a closer look.

Porphyrin: The Red Tears

One of the most common concerns for gerbil owners is seeing a red, blood-like discharge around their pet's eyes or nose. This substance is not blood. It is a pigmented secretion called porphyrin, which is produced by the Harderian gland, a special gland located behind the gerbil's eye.

• What it Means: A small amount of porphyrin upon waking is normal, similar to "sleep" in a human's eye. However, a persistent or excessive amount of porphyrin staining is a non-specific sign of stress or illness. It's the gerbil's way of saying, "I don't feel well."
• Common Causes: The underlying stressor could be environmental (like a dirty cage or improper bedding), social (bullying from a cagemate), or medical (like a respiratory infection or pain from another source).
• Action: If you see excessive porphyrin, it's a signal to play detective. Assess the gerbil's environment and behavior. Is the bedding dusty? Is there a clicking sound when they breathe? Are they losing weight? Porphyrin is a symptom, and you need to find the root cause.

Common Eye Problems

1. Eye Infections (Conjunctivitis):

   • Cause: A bacterial infection of the eye is often secondary to irritation. If a gerbil gets a piece of dusty bedding or sand in its eye, the irritation can allow bacteria to take hold.
   • Signs: The eye may be held shut or be "glued" closed with discharge. The surrounding tissue will be red and swollen.
   • Action: This requires a veterinary visit. The vet will gently clean the eye and prescribe a medicated eye drop. Do not attempt to pry the eye open yourself, as this can cause further damage.

2. Irritation from Bedding/Dust Baths:

   • Cause: Using the wrong kind of bedding or dust bath material is a primary cause of eye irritation. Cedar and non-kiln-dried pine are toxic, and some commercial beddings are excessively dusty. Similarly, sand that is too fine or dusty can easily get into the eyes.
   • Signs: Redness, squinting, and excessive porphyrin production.
   • Action: Switch to a low-dust bedding like aspen or a paper-based product. If using a sand bath, ensure it is a high-quality, non-dusty sand specifically for small animals.

3. Protruding Eye:

   • Cause: A bulging or protruding eye can be caused by a number of serious issues, including a tooth root abscess, a tumor behind the eye, or trauma.
   • Action: This is a medical emergency that requires immediate veterinary attention.

Prevention

• Use Appropriate Bedding: Aspen, kiln-dried pine, or paper-based beddings are safe. Avoid cedar and dusty alternatives.
• Keep the Cage Clean: A clean environment reduces the risk of bacterial infections and minimizes stress.
• Quarantine New Gerbils: Keep new animals separate for at least 30 days to monitor for any signs of infectious disease.
• Check Eyes Daily: A quick daily check of your gerbil's eyes is the best way to catch problems early.

By providing a clean, low-dust environment, you can prevent the majority of eye irritations and infections in your pet gerbils experience.