I’ve found it listed on both safe and dangerous lists, it’s quite confusing. I think I’ll err on the side of caution and pull ‘them up and bin them!Buttercup, ragwort, foxglove and bindweed are poisonous to your guinea pig. And of course there are several other poisonous plants to be avoided. Remember if in doubt as to whether a plant is safe for your guinea pig, don't give it.10 Sep 2009
Found this on google search