I remember some months ago, someone had figured out some interesting tunnels and multi-entrance hanging cave thing for her ferrets. I thought I had sent myself a copy of that topic but cannot find it now. I will be losing one of my two ferret boys to cancer soon and thought I would make some challenging in-cage toys for my Pooka. if this rings a bell for you or someone you know, please PM me. I would love the pattern and would be happy to buy it. thanks