You can soak her foot in warm Epsom salt water till you can easily peel the scab off in the meantime after you soak you can use a drawing salve [prid is one] to try and bring the bumble to the surface so when you get the scab off hopefully the kernel will be attached to the scab then you pack with an antibiotic ointment and wrap till healed. Once you get the kernel out check in a few days to make sure you got it all. Keep her out of water while it is healing. Do you need info on how to wrap?