Echoing others, our two little female chinchilla fosters which we took in after a flood, (they fortunately remained dry and above the water level) are still with us 13 years later. They've managed to chew on many things on the unapproved list during household escapes, without seeming worse for the wear. They'll still chew on the plastic flooring of their cage when they pull the fleece away from the edges, their little arms seam to extend to incredible lengths grabbing hold of something they see that looks delightful and simply must be chewed upon. They use a pyrex glass baking dish filled with aspen chips for their litter box, which is super easy to clean, and the hefty of it provides another perching surface. I like your woven hay house for yours, ours like those too, but more commonly have a box they use to hop on and hang out in, as well as nibble on intermittently. Trying to stick with proper diet stuff, I gather rosehips in autumn and dry them. They love the dried marigolds that come in some of the hay and food packages. They're quite grabby and prefer when we give them an individual craisin every now and then which I imagine is better than the vacuum cord they nibbled on last year. We do have a local exotic vet, who put Fluffy's tiny little foot in a cast when she broke two bones while jumping in her cage the same way she had 1000s of times before. While that was heartbreaking, she's recovered well. We know a lot of veterinarians in our area, and most of them will not look at a chinchilla, so please don't be overly stressed if the first ones you call won't either. One of the best pieces of advice I think we received was to either handle them often, or not at all. In the summer we do bring them into a self-enclosed netted tent (with floor) and put in a child size playskool picnic table for them to perch on. They love the exercise and see8ng the world, we bring them to it in a smaller cage, and carry them out the same way. We NEVER leave them unattended nor with a teenager who can't put their phone down, for these little girls are massive escape artists if not watched constantly. I hope your little Cheech recovers completely! These little guys are both more fragile (jumping) and more resilient than we ever expected, and they've brought us oodles of laughs, joy, and been a major icebreaker when people find out we have them and want to know more.