I don't think the type of food, or either lack of, or abundance of, is an issue here. I think most of us on here would prefer to follow Defra guidelines on this occasion - whether law or not they are sensible for once. If you do not check your animals at least once a day you cannot pick up on their well-being or illness, and that is what is of utmost importance to most people who raise animals/poultry on a smaller scale than commercial ones, whether 3 birds or 103. JMHO