There are three reasons why Irish Terriers have eye mucus: 1. Too much salt and oil in their diet, 2. Eye mucus caused by dogs getting angry, 3. Caused by eye diseases. When the owner discovers a lot of eye mucus in the Irish Terrier at home, he will Use eye drops to wipe the dog's eyes every day and then instill them, and then feed the dog light food. If the Irish Terrier puppy has a lot of eye feces and the body's vitality is reduced, and the food is reduced, it may be that there is a disease in the body. It is recommended to send the dog to a pet hospital for further examination.