Hi Baldwin hedgehog
I don’t know, but wonder whether they would be more likely to eat the leaves? Also, I think it is illegal to dig up wild plants unless it is on your property or you have permission – but maybe you’ve got that covered.
The only way you can really tell whether they have worms is if you do a worm egg count. I think it is generally accepted not to be a good idea to treat for worms unless they actually have them. Not sure how a possible ‘natural’ treatment relates to that.