I have obviously heard the dangers of using wood shavings for bedding. In particular, one always hears about cedar and pine shavings being particularly dangerous, while aspen is less so. As such, I have always avoided using wood of any kind in my guinea pig cages, opting to use fleece, paper pulp, plastics, etc. for the infrastructure of my cage instead. However, I have also seen/heard of people using wood for hidey boxes for their guinea pigs. I've seen in some threads on here that people say pine is the best option for wood hidey boxes. I was just wanting some clarification. Is it dangerous to use pine (and other woods) for hidey boxes? If not, why is it safe for hidey boxes, but not for wood shavings? Wouldn't the dangers of the oils and aromas be just as prevalent in a hidey box as in shavings for bedding?