When it comes to building guinea pig cages, the front wall of the cage is the one that allows more freedom, and when the cage has a single compartment, half or a larger part, the left one is recommended to be made of wire mesh on a wooden frame. In the case of cages with two compartments, only the left wall is recommended to be open, while the right compartment, to be more secure, with a front wall made of board. In any of the mentioned variants, the front wall must practically represent a door, so it must have solid hinges, to serve for cleaning, feeding and catching animals, etc.