I have another concern about the sod for your ferret pen. The bottom
layer of sod is a plastic mesh. This mesh is like heavy fishing line
woven into squares. If (when) the ferret digs, it could become
entangled. A ferret might look at it as something to eat. A friend lost
a wee one years ago after he ate beading string. I have adopted Desert
Tortoises. Their yard area is half sod. Last summer one female decided
to dig the sod and got the mesh tangled around her legs. I expect a
ferret could run into some problems too, I know you will want to watch
closely. Your play area sounds just wonderful.
Ardith
[Posted in FML issue 4916]