To treat dog conjunctivitis, see a veterinarian who can determine the cause before prescribing an eye ointment, eye drops or an antihistamine, depending on the situation and animal. Care for conjunctivitis in a dog withhealth information from a veterinarian in this free video on pet care. Expert: Dr. Aimee Beger Bio: Dr. Aimee Beger works for mcclintock Animal Care Center in Tempe, Ariz. Filmmaker: Ryan Quinn