ok its the donkey but the horse helps too. over the winter they have debarked a few big trees, which is no big deal I will chop them down for firewood. but i want to keep them off the rest of the trees I do want. Some trees i have electric wire around but I cant on all the trees. Any idea of something ling lasting and nontoxic to spray the trunks with? to keep them from stripping the bark. vinagar works but is gone a day. natural pine tar works but dries out and then becomes a tasty treat. I ave afew with "tube" of diamond wire around the trunks, that seems to work but I have a lot of trees... Help!