hi, I have a porcupine that comes in the night and is really damaging my pine trees that were planted twenty five years ago from a little sprout. I have metal around the tree trunks, but some how the porky gets over the metal. I have a have a heart trap with salt as a lure that does not catch the porky, three raccoons but not the porky. I would appreciate any information that would help me get this varmint. thanks spike