I too would block off the bottom of the shed as tethering a bunny up could do it more harm than good :wave:
My personal experience with Leads/Harnesses - I only use harnesses for vets trips.. my rabbits are more relaxed being able to look out of the window, and hop into the foot well. They are more inquisitive and like sitting on my lap sniffing the car door.. window... or anything they can safely reach
When I am not driving that is!
The carrycase seems to produce stressed out fast breathing, hot eared buns. 3 of my buns have worn harnesses since they were 12 weeks old and the other buns have never known any different since coming to live with us.. the only exception is Flossie who I adopted from FatFluffs.. she was really nervous and didn't like being held that much, and so for her VHD jab she and Crackers snuggled in the carry case together. I wouldn't try a lead on her to be honest.. I do think she would resent it. I would never force anybun to wear a harness if they were not ok with it or were jubious about being held.
Toshi my bridge bun loved having his harness on and would trot off up the road and take me for a walk, whenever we got home from the vets! But he was the one who was most used to the harness and would walk on it, not pull or jump or panic etc like most rabbits will. I have previously had rabbits who do not like harnesses and so they travelled in the carry case.
I know many people do not like the use of harnesses on rabbits. But given the fact mine do not mind them, I do not mind them.. but would not use them regularly / for taking my rabbit for daily exercise (their original intention when designing them perhaps!?) rabbits love to run free in a secured garden.