why are my dogs eyes always red

why are my dogs eyes always red


Why Are My Dog’s Eyes Always Red?

As a caregiver, your dog’s health is always at the forefront of your mind. You’re likely here because you’ve noticed that your dog’s eyes are often red, and you’re seeking answers. We’re here to help you understand the possible causes and how to address them.

1. Allergies

Just like humans, dogs can also suffer from allergies. These can be due to environmental factors such as pollen, dust, and mold, or food allergies. If your dog’s eyes are red, watering, itchy, and they’re frequently scratching or rubbing them, allergies could be the culprit.

Symptoms to watch out for:

  • Redness
  • Itching
  • Watering
  • Rubbing or scratching at eyes

2. Infections

Eye infections are common in dogs and can cause redness. These can be bacterial, viral, or fungal. If your dog has a discharge from their eyes along with redness and seems uncomfortable, it could be an infection.

Primary signs of an eye infection:

  • Discharge
  • Redness
  • Swelling
  • Rubbing or scratching at eyes

3. Dry Eye

Also known as Keratoconjunctivitis sicca, dry eye is a condition where your dog’s body doesn’t produce enough tears. Redness, discharge, and a dull appearance to the eyes are common symptoms.

Indications of dry eye:

  • Redness
  • Discharge
  • Dull appearance to eyes
  • Rubbing or scratching at eyes

4. Injury

Sometimes, a simple injury can cause redness in your dog’s eyes. This could be a scratch from playing, debris getting into the eye, or trauma.

Signs of injury:

  • Redness
  • Swelling
  • Visible scratch or wound
  • Squinting or wincing

5. Glaucoma

Glaucoma is a serious condition where the pressure within the eye increases. This can cause redness, pain, and eventually, loss of sight. If your dog’s eyes are red and they’re squinting or seem to be in pain, seek veterinary attention immediately.

Warning signs of glaucoma:

  • Redness
  • Squinting
  • Dilated pupil
  • Visible discomfort


Q: What can I do if my dog’s eyes are red?
A: Start by identifying any other symptoms. If the redness is accompanied by apparent discomfort, discharge, or changes in behavior, seek veterinary care immediately.

Q: Can I use human eye drops for my dog?
A: No. Human eye drops may not be safe for your dog. Always consult with your vet before administering any medication.

Q: How can I prevent eye redness in my dog?
A: Regular grooming, feeding a balanced diet, and keeping your dog’s living area clean can help prevent eye issues.

Q: Could red eyes be a sign of an underlying health issue?
A: Yes. While red eyes can be due to minor problems like allergies or injuries, they can also indicate serious conditions like glaucoma. If you’re unsure, it’s best to consult your vet.

Q: Is redness in one eye a cause for concern?
A: Yes. Redness in one eye can be a sign of an injury or condition like glaucoma. If you notice this, seek veterinary care immediately.