u/Melodic_Necessary792

My 2 piggies live inside and outside. They are outside most of the day playing around in their pen which has straw, branches, wood etc to keep them busy. They come in at night (and when it rains) sleep with us on the sofa and then go to their own bed. They have started chewing my skirting boards which is driving my insane, I have read this could be either to do with teething or lacking in minerals.
What supplements/minerals can I give them to help?
Picture so it doesn’t get lost.