Chicken wire is a fairly flimsy wire, anddoesn't add much rigidity to any structure. If you have a bunny thatweighs more than a few pounds, the wire will bend if he/she leansagainst it. Not good for a condo. If this is just an indoor cage, I'drecommend hardware cloth at the very least (it is 1/4" square mesh thatcan be found at hardware stores)- but I prefer galvanized welded wire.I've seen some indoor cages made with 1" square wire that look prettysnazzy- I use 1x2" for everything but the floors of my outdoor cages.You can find it at farm supply stores (like Tractor Supply) If you usewood framing, either prepare for the rabbits to chew it- or figure outa way to have it on the outside of the wire.
I read the article about pine shavings. Interesting. I knew cedarshavings were bad for the reasons listed in the article, but havealways been told and read that pine was safe. After re-reading it, thearticle says that aromatic shavings are the ones that cause theproblem. I think if you stick with kiln-dried pine shavings you areprobably fine- they don't have much scent to them. Pelleted woodbedding (like Woody Pet, etc...) is basically just made of chopped uppine shavings- and it seems like most rabbit people (myself, included)highly recommend that stuff.