The staple food of Irish Terriers can be fed with nutritious dog food, and homemade meat and vegetable food can be added twice a week. You can also buy pet snacks and feed Irish Terriers in cans. Pay attention to the dosage when feeding. Do not feed a large amount of food to the Irish Terrier at one time to avoid the Irish Terrier's gastrointestinal indigestion and physical discomfort due to gluttony.