No, but you can if you like. One of the primary goals in designing Keto Chow was to make sure that it is nutritionally complete.
Most people will do 2 meals of Keto Chow and 1 meal of regular keto-friendly food. Others only do 1 Keto Chow a day. Some will mix up Keto Chow to a lower calorie amount so they can have other foods as part of their meals.