Pine and cedar have greater phenol content than cypress and aspen...
That being said, I'm not going to comment on the safety of pine bedding as I have absolutely no experience using it. Some people claim to have had problems from it, some people claim to have used it for years with no problems. It's just one of those things where you've got to weigh the evidence. Personally, I would probably switch to something like newspaper or paper towels rather than using pine, but that's just because I've used newspaper for my colubrids for years and it's free. Plus my snakes seem to enjoy getting between the pages.
The only thing I'd say definitely never use is cedar. It's kind of in a league of its own when it comes to potentially harmful compounds.
Reply With Quote