This document provides instructions for building a feral cat shelter. It begins by outlining the basic principles for an effective shelter, including being dry, warm, and having two exits. It then lists the necessary materials and provides step-by-step instructions to construct the shelter from plywood and wood boards. The shelter features a hinged roof for easy access and waterproof roofing material. Once constructed, it should be filled with straw and have canvas flaps on the entrance holes.