Requirements and conditions for slaughterhouses using cages, and with capacity of production not exceed 200 birds or 150 rabbits are: (a) slaughterhouses must be built in cement; (b) floors shall be paved with suitable tiles; (c) walls shall be covered with porcelain for at least half of the height; (d) windows shall be protected with metal nets to prevent the entry of insects; (e) heights of slaughterhouses shall be at least 3 metres; (f) surfaces of windows shall be at least 1/6 of the surface