Hi, I've also bought these for my rabbits (they are marketed by Burgess as being suitable for rabbits).
They've been eating them for the past 6-8 months with no ill effects and particularly love the chicory. They love them and I usually buy half a dozen packs of each at a time.
Here's the link to the Burgess page. I think they're safe for rabbits, but you may want to contact Burgess direct if you still have concerns.