As soon as I got my Flopsy he went into his new hutch which we had altered to have a catflap in order to get down into his run, via a tunnel. I was worried at first but decided to let him check it out for himself first.
No problems - it took him a whole of about half a day to suss it out and even when I introduced his new lady (Jem) it took her no time at all as well.
Didn't even need to show them how - just left them to fathom it out.