i currently have a large one level cage that measures approx 2' x 4' x 22'' (that's very rough). The cage's base is about 6" high, which makes it great that its just high enough for the pigs to look out over, but not jump out of when the top is of, though they have been known to manage an escape. lol I was wondering though if i could somehow build another level to put inside as a ledge for more hay and so they can really get more exercise in running. the bars are fairly largely spaced and aren't quite a grid. I will try to show some poor images of the cage and maybe if anyone knew where I could get supplies or even buy a good ramp that would be great. I'm in the Toronto area.