Use heavy-duty wire snips
Cut 1-by-1 cedar into 4 strips–2 should be 32 inches long, and 2 should be 18 inches. Nail strips all along the inside of the lower rectangular frame to act as a nailer for a wire mesh floor.
Cut a piece of wire mesh to make a floor for the upper half of the hutch–about 32 by 20 inches (but check the actual dimensions of your rabbit hutch to ensure proper fit). Use heavy-duty wire snips to cut through the material and make a notch in one corner that is large enough for a rabbit to pass through to access the lower level. Be sure to file off any sharp edges. Attach the mesh to the 1-by-1 cedar nailer using fence staples.