this is my hayrack , it is a long outside hanging basket (just screws on the wall)
it only cost a few quid and is big enough for my two squish butss to get in easily i used a sheet of that weld mesh stuff and cable tied it on the inside just to make sure no bunny heads went in the gaps and got stuck (although i might be paranoid :? )
i would recomend them 100% i love my hay rack