On another another note - accidental bunny progress!
So our bunny sitter apparently took a day to get the hang of clipping the bunny cages closed. She came back after her first visit to find that both had escaped

! But no injuries were incurred. Lito has gotten older, wiser, faster, and bigger it seems. So we're starting to let them both out.
Munchkin's still bullying Lito, but it's remained bluster and chasing, no biting and scratching. Lito's still dumb enough to walk right into Munchkin's cage, but even in there Munchkin just chases her out.
So they are hardly fast friends, but we're no longer worried about serious injury.
Small step but an encouraging one.