I bonded a pair last winter, I started by switching them between hutches each night and I put them together on top of the hutch and stayed with them, tried to encourage them to eat together etc but it was hard, my female was scared and there were a few good nips! A few people recommended it wasn't the best method and to put them together in a small neutral space which I did and they just fought so I had to separate. I was put off until one fine day I just thought right, you're bonding! I put them together in the run (not neutral or that small!) and watched them from a distance. There was a lot of chasing and fur pulling but it was the best if seen them together. They were only in there for a couple of hrs maybe then I put them together in the hutch (which I'd thoroughly cleaned and neutralised while they were in the run). They pretty much stayed on opposite sides of the hutch for the first few days, the female was still scared and the make would chase and bully her a bit but I found that leaving them alone and watching from inside was better than me being there or keep going out. It is worrying, I was up and down every 2 mins to look out at them but they were fine and gradually grew to love each other
Not sure how helpful this will be as u have a shed but if there's any way u can watch them from a distance (a webcam maybe?) that might help as it did with mine :wave: