I'm the odd one out here, I do use huts that I make, and throw out and make again. Without behavior issues, one GCC for 17 years, and ongoing at six years for my current GCC. I use cardboard and buy material like canvas or fean that isn't easy to get threads out of. If they chew on it I start over, I've used seagrass, and just cardboard too. You can also get a wood platform, and hang a seagrass curtain on one side, I do the front so they have privacy for sleep. I keep all of mine pretty open more like hammocks....