See one of those little log bridge/huts on sale for small pets for chewing, but they say it's made of "china fir" wood.
Looking that up, I found this: "The genus Cunninghamia is a genus of one or two species of evergreen coniferous trees in the cypress family Cupressaceae. They are native to China, Taiwan and northern Vietnam..."
Is this okay for degus? The price is great, but so what if it's not safe...
China fir is a species from the cypress family. As I remember correctly cypress species are regarded as unsuitable for small mammals in general or at least as problematic species. That might give us a clue, but of course the last word isn't spoken. Additional researches about containig compounds are needed.
Vana, Clio and some dwarf tropical woodlice (Trichorhina tomentosa)
They sell this as a toy, hut, and chew toy for all small mammals. But I haven't seen this kind of wood used anywhere else, tho many small wooden things they are mysteriously vague about what it is made of, so I don't get them. There are so many things for sale which are known to be no good, yet they still sell them.
Darn. It was cheap and already made and just what I've wanted.