The beauty of this project is that the objects to be lost in this cast are hay-bales and the method of removing such hay is to allow a single cow (over the span of it's lifetime) to eat away at them it is satisfied to move on.
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This video documents the process and the resulting accommodation that they were able to produce from the resulting spacial cavity. They cut two flat openings in the casted boulder-like form and fully furnished it with a bed, running water, a fire place and large window glazing.
Adrian Forty wrote that: "Concrete is not a material, it is a process. As well as the ingredients of water, cement, reinforcement and sand, it contains the essential ingredient of human labour". Ensamble Studio have used the ingredient of a cow's appetite as a construction solution.
The process of lost-mould casting isn't limited to concrete, it can be a solution for any material use which requires the shaping of one material upon and around another that is to be removed.