INDICATION
 
Tearing reddened or squinting eyes in your dog or cat could be a sign of an eye infection. infections are caused by a foreign object or an irritant in the eye or by a virus, bacteria, or fungus that's attacking your pet's system. Oftentimes the eye infection follows a bacterial infection in the body. Eye infections can also be brought about by different types of trauma to the eye or to the immune system, allowing a virus or other infecting agent to take hold.