Dog keratitis is caused by trauma or foreign objects. It may also be caused by infectious diseases or parasites. It is difficult to heal on its own, and the disease changes quickly, so timely treatment is required to avoid affecting vision. If the symptoms of keratitis are mild, you can use physiological saline to rinse the dog's eye secretions to reduce inflammation, and then instill antibiotic eye drops. It usually takes 3 to 5 days to recover. If the situation is serious, you need to go to the hospital for timely examination and treatment to prevent the condition from getting worse.