Thanks for responding for me ScottMThey are modular wire shelving storage units,
http://reviews.canadiantire.ca/9045/0680700P/no-4-cube-wire-shelf-reviews/reviews.htm
I use those shelve cubes for just about everything, from rabbit hutches, to pens when we let little chicks play in the grass before they are moved outside, to sectioning off areas when we are introducing new birds. They have gotten so much use that I had to buy some new ones because I couldn't get them clean enough for my liking
hehe

