The top of my girl's cage looks like this. This side of the cage has several perches attached to it, instead of a third shelf. The weight of the perches makes this side of the cage bow inward. This makes the perches wobbly. I have been putting a small binder ringer to hold the side of the cage to the edge of the top. It makes it much sturdier. I was wondering if anyone could suggest anything else? The rest of their cage is filled with toys and tubes, not really leaving room for me to move the perches. I would put the third shelf in, but they prefer their perches to shelves.