Causes of Conjunctivitis
There are many causes of conjunctivitis. They include trauma, allergies, foreign body intrusion, bacterial or viral infection, neoplasia and immune-mediated conditions. Certain breeds are predisposed to developing conjunctivitis, especially those with long narrow skulls, deeply set eyes and inadequate tear drainage(Afghan hounds, Dobermans, Poodles).
Dogs chronically affected by conjunctivitis – especially if it is due to a structural or conformational breed predisposition – probably should not be bred. Dogs with an immune-mediated cause of conjunctivitis may require lifelong oral or topical prescription therapy.