Reddit mentions of Blankets, Textile

To add a helpful suggestion, this x style pens from Amazon are both cheap are safe for rabbits: https://www.amazon.com/gp/product/B00IX6S8YI/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

Get the 24 inch version, and go over to uhaul or johanns, better yet both, and get some uhaul moving fabric (recycled denim) and some fleece to put on top. Super cozy, and will protect from accidents.

And get a cheap 6 dollar open top litter box, and some pine litter. You'd be amazed how quickly they pee train themselves. :) Rabbits don't generally pee on the floor, but if you are still nervous, get some pond liner. It's thick plastic, and you can cut it to size underneath the fabric

/u/ruthbigsby is commenting on the fact that wire bottom cages cause sore hocks (word for rabbit feet) which is an infected inflamed foot. Super unpleasant for both you and the rabbit.

Cute babes!

The two main problems with small rooms are resonances and parallel surfaces. How you deal with those things depends a lot of what you're trying to record, how much you are trying to record at the same time, and if you are also trying to create a good monitoring environment as well as a recording space.

The smaller the room the more absorption you are likely to need. In a room this size, carpet or rugs on the floor are a almost a necessity. Good broadband absorption requires much more than just acoustic foam, which can often make a room sound very dull and boomy. Use at least 2-inch thick absorbers made of Owens Corning 703 or something similar. It can be fabric covered pretty easily, and inexpensive burlap can make it look attractive. (I suggest acoustimac.com as a reliable source. Their Room Calculator is very helpful.) You can also use felt moving blankets folded over to be a couple inches thick and they are very cheap. You can cover these with burlap curtains.

Start with 2' by 4' panels mounted about 30" off the floor and covering maybe 20% the total wall space in the room. Add ceiling panels if the room's character is still to obvious in your recordings. You may want to add thicker panels (4-inch) as bass traps in the corner. For acoustic and classical music (guitars, violins, reeds, etc.) you will want less treatment than for rock or pop music. If you're using the room for mixing, too, then go a with more absorption also.

The more furniture, cushions, books, or almost any "stuff" you have in the room, the better. It breaks up the parallel walls and reduces reflections and resonances. I have known people to buy inexpensive clothes racks like this. I have known people to move their clothes from their close to the studio for some critical recording sessions.

Hope this helps.