So I am planning on making a 3x5 or 6 NIC cage for my 8 week old holland lop. I have a friend that has extra linoleum that I will use for the base. He said I should be able to just put it on the floor, but I feel like putting linoleum on carpet won't work. Do I need a base the linoleum and if so what should it be? And what should I do if I add in other levels?