Do guinea pigs need this type of food?
Guinea pigs need hay. It wears down the teeth and keeps the GI tract moving. You cannot eliminate hay form their diet. They also need Vitamin C. While some veggies to provide this, not all do and you need to provide enough veggies form them to get the vitamin C. It can be difficult to provide enough variety for them to get the vitamins and minerals needed. A good pellet provides the vitamins and minerals needed. You don’t have to give a lot, but you should give some.