I've given up with the ramp in the boys cage they just wont use it so I've taken it out, which has freed up space, now I'm looking to buy two hidey s for my 120 liberta cage. I'm looking on-line so many different sizes to choose from.
Id say without. then the wee goes straight into your bedding/ towels.
I have one with a bottom and the poop and wee just stays in there and the pigs dig any bedding out of it so they end up seeing in their poo!
thers a few things in that cage :-)