Symptoms of Runny Eyes in a Dog

• Runny eyes are a symptom of everything from allergies to more-serious conditions.DOG"s EYES image by BubblesLover from Fotolia.com
  
  Something as simple as a stray eyelash can irritate a dog's eye, but runny eyes also can indicate an underlying health problem, like allergies or infection. Runny eyes are a symptom of more-serious conditions, as well, such as worms, distemper, thyroid imbalances and liver problems. While there are plenty of common and easy-to-treat problems that cause runny eyes, pet owners should know when to call a veterinarian.
  
  

Conjunctivitis

• Conjunctivitis, better known as pinkeye, is an inflammation of the membrane that covers the inside of your dog's eyes. A dog with conjunctivitis may have red, weepy eyes with a crusty discharge.
  
  

Eye Trauma

• Dogs are exposed to potentially traumatic eye irritants every day: cleaning supplies in the home, smog outside, sharp sticks in their play area, plus other animals. There are dozens of ways a dog can injure an eye or eyes, causing them to water and become red. If your dog won't open its eyelids or rubs at the eye or eyes with its paw, odds are there is an injury.
  
  

Eye Cold and Sinusitis

• Watery eyes is one of the first symptoms of an eye cold or sinus infection in dogs. If it looks like your dog is crying or the fur around its eyes is wet, there could be problem. An underlying virus shows up as swollen, red eyes with a non-clear discharge.
  
  

Breed-Specific and Hereditary Issues

• Particular breeds of dogs--boxer, poodle, bulldog, just to name a few--are predisposed to extra eyelashes that rub the eyes. Also, some dogs are born with tear duct problems. If you have one of these dogs, trim the hair short away from its eyes, and as much as your eye-sensitive dog loves to hang its head outside the car window, keep it inside.
  
  

Professional Help

• The American Kennel Club says healthy eyes are bright and shiny, and any mucus or tears that come from them is clear. Nothing, including the lining of the eyelids, is swollen or inflamed and there is no colored discharge. If your dog has watery eyes with a yellow or green discharge, or its eyes are swollen, make an appointment with your vet for treatment and to confirm it is not a sign of a more-serious condition.