Hi, I'm in the process of converting my glass covered balcony into an aviary for max. 4-5 small birds and was wondering what's the best idea for a floor covering lining. I really want to use natural grass, but I guess that will take longer maintenance, or some lining I can easily remove and wash in the machine, or just throw away. The space is 14 feet long and 6 feet wide. No way the lining will ever be tossed outside of the balcony since the only outlet for it to come out is a small water drain that can be covered. Thank you!