don't quote me on this.. but I thought those were bad for rabbit's feet..http://www.rabbitnetwork.org/articl...sics.shtml
"It is important not to have a wire floor because these can wear down the fur on a rabbit's feet and lead to skin breakdown and infection. Wire floor cages are also very hard to keep clean, so we recommend having a solid surface and a litter box--both you and your bun will be happier!" http://www.mahouserabbit.org/infopack.asp
"Cages in general
Rabbits were not designed to live on wire floors! Living on wire floors can cause a condition known as sore hock to develop on their feet. Cages with wire floors were designed for the convenience of breeders who were looking for an easy way to clean up after the most rabbits in the least amount of time. Cages with wire floors must have a piece of untreated plywood, rice or maize straw mat, plexiglas, or carpet that the rabbit can sit and lay on. If you try carpet and the rabbit chews it, immediately replace it with something else."http://www.aspca.org/site/PageServe...rabbitcare
"Although wire-bottom cages are common, they can ulcerate a rabbit’s feet. If you have a wire cage, cover the bottom with a piece of wood or corrugated cardboard. Better yet, buy a cage with a solid bottom. Please put down plenty of straw, hay or aspen shavings so your pet can make a cozy nest."
that's just a few things I found quickly googling the issue- I'm sure others on this site can give their input.