A feed product for animals foams and expands when blended with an activator. The feed product is a liquid or a paste. The foaming can be carried out using a variety of foaming agents. A disclosed foaming feed composition includes water, one or more food components, and a reactive combination that reacts to form a gas, wherein the reactive combination including a first reactive component and a second reactive component. Methods of forming and using the foaming feed compositions are also described.
