Well, most told me it could not be done. Keeping rabbits in a green house that is. I was told it would be to hot in the summer and to hard to heat in the winter. This spring we equipped the green house with roll up sides and put on a good shades tarp. Also had a commercial fan to help with air circulation. I also eliminated all but a few hanging cages and put in pens, 4 does and 1 buck per pen. At first we did not do anything to the bottom which turned out to be a mistake as the rabbits started burrowing and digging out. A good solution I found was to line the bottom of the pens with peg board. There was a bunch of damaged peg board at home depot so I got it at 1/2 price. This is just compressed wood with holes so it works for drainage and if it falls apart eventually, it will get composted. I then put a layer of shaving in and lots of hay. I put numerous nest boxes in each pen as well as some large PVC pipe that the rabbits like to hide in. All the rabbits seemed much happier being able to hop around and there really has not been any fighting between the colonies. Liters are being born and raised successfully by the does in this group setting. Now the real question was will this work in winter? I am very happy to say yes. The snow will melt of the top and almost make an igloo type effect at the bottom of the greenhouse and this has insulated it well. My big concern was keeping the automatic watering system running with out the lines freezing. At night we were running a small kerosene heater and up till this week when temps have been in the 20's this has worked well. Last few nights it has got into the single digits with lower wind chill temps. Last night was the first time the lines froze. Luckily they did not burst. We went and bought another heater but this one is a propane heater that will run on 100 lb tanks of propane. In a matter of 1/2 hour the temps were up to 50 some degrees and my lines have thawed. While it is so cold we will run both the kerosene and propane at night when there is the most heat loss but during the day the heat is not necessary if it is sunny. I am still getting nice big litters and I would honestly never go back to cage raising. Also the maintenance is much less. I have found if you do a heavy layer bedding system, keep adding more hay the rabbits stay pretty clean. Every 2 months the rabbits are removed from their pens, the pens are totally stripped and redone with new shavings and hay. The few cages I still have hanging I use for grow out/holding pens till butchering. Underneath the cages I have started growing cat nip. I also have tons of worms growing under the hanging cages as well. I decided on cat nip as I will harvest this and dry it and sell as a cat food treat. I might incorporate other things growing as well and supplement this for the rabbits. Any one know if you can feed rabbits cat nip? This green house is 100X12 and I have 10 pens set up and then 20 cages. So right now I have my 40 breeding does, 10 bucks and then my litters. If this continues to go as well as it has I will be looking for another greenhouse come spring. EBay here I come! [EBay is where I got the original greenhouse and what a deal I got] I might even think about trying to raise some quail or something in a similar set up. Think outside the box folks. This can be done.