I am currently constructing a rabbitat for my two little munchkins to move into when they have finished bonding. The current design has a lower cabinet under the actual living area for hay and litter storage, so the rabbits would need a ramp to get to the floor on their own. The floor of their enclosure is 18 inches off of the ground. I wasn’t sure what sort of angle rabbits could handle, so does a 20 degree incline seem too steep? I was planning on carpeting the ramp so they had better traction. My largest rabbit is a 6-lb mini lop, so I was thinking that an 8 inch wide ramp would give him plenty of space. The last question was should i enclose the ramp with wire mesh so they don’t fall off? 18 inches isn’t really that high, but I was afraid that with two rabbits trying to leave the cage at the same time, there might be safety concerns.

The green and yellow portions are the cabinet space. Their first floor is the top of the yellow section. Interior ramps and the enclosure’s doors and legs are hidden in the model. their ramp would start in the top right corner of the lower level and slant down across the front face of the structure. I would have it end with a small platform (4-6 inches high) that they could easily hop off of.
Thank you for any advice!