Jessie In large hardware stores such as Lowes or Home Depot and sometimes even Walmart you can find the clear plastic "corners" meant to protect sheetrocked corners in houses. You can drill (or use a pointed type soldering iron to burn) holes through with you can run wire ties to attach the corner protectors to the inside of the cage. And, just out of curiosity, do your ferrets actually use the tunnels? I was given one of these cages and all of my bunch, after one attempt, looked at me like I was an idiot and refused to set foot in them. Rachel I'm likely to get scolded for this, but my first recommendation to you would be to find another vet. I'm fairly certain that most of the country has designated the domestic ferret as a domestic animal, which makes a lot of sense to me since ferrets do not survive well at all in the wild. If your vet said, "ferrets are wild animals", he is not a ferret vet in spite of whatever he professes. It seems to be a common assumption of many otherwise well educated veterinarians. If a vet does not keep up with the advances in the fields of a specific species that he treats, he is not, in my opinion, a responsible professional. My local vet (primarily my cats' vet) administers rabies shots to ferrets but was surprised that I wanted tags as well as the certificate. To actually answer your question, ferrets statistically seldom transmit rabies. However, I vaccinate for rabies all ferrets that go anywhere with me. This is mainly to protect them in the event someone claims to be bitten or scratched by them. Imrab 3 is the appropriate rabies vaccine for ferrets. Debi Christy [Posted in FML issue 2988]