I was thinking about getting leftover pine trees for my two Nigerian dwarf goats. Is it okay for them to feed them a lot of pine? What I read said in moderation, pine is good, but what is moderation for two Nigerian dwarfs? Is a medium sized tree (5-6) a day too much? I do not want my goats to get sick over overeating pine. Where I live, everything is pretty barren right now so they would enjoy some fresh stuff.