Bumblefoot in rabbits looks like it would be very painful. Here is some information about bumblefoot in rabbits.
This is an inflammation of the balls of the feet and is usually caused by infection. This infection occurs when you pet ha broken skin on the bottom of their feet and bacteria gets into it. This is a wound or abrasion on the foot.The skin can become broken from the bottom of the cage floor if it is just wire mesh.
This will usually first appear as a small, reddish bump/lump on the bottom of the foot. This may look similar to calluses on human feet. Their is a closed abscess inside the lump. When the lumps grow large, they may break open and bleed. This is when they could be infected.
There isn't a certain treatment for this so you may have to visit a vet to see what would be the best for your bunny. To help prevent bumblefoot in rabbits, you need to make sure that there is no trauma to feet which could be from walking on wire mesh, a clean hutch so they can't get an infection and solid surface floors.
Here are some bunny products which you may be interested in, if you are take a look!
If you have any questions or concerns about bumblefoot in rabbits comment on this post.