I'm absolutely in love with the new pens. Funds are a little tight as I'll be making a trip to Mini Lop Nationals soon, but these make great turn out pens for our rabbits to be safe while I'm cleaning out the rabbitry. We recycled some extra chicken wire and roofing supplies, so that helped cut down cost.
The pens have chicken wire along the bottom to prevent digging out. I do plan on changing to a better wire this summer after I save up some. Also, probably could put the wire along the inside, rather than the outside.
Making one takes a little time, but worth it :-) If you can,add some wheels for easy mobility. Also, this is a great way to get rabbit poop directly onto your grass. One of the best fertilizers around!
Remember, when used in the summer, you MUST provide shade. Water is a must regardless.