I currently have a large dog house in my yard. It has a heater in it that I may or may not be using (hangs from the ceiling). I will remove the separation wall in it. My entire yard is fenced with what you see behind the coop. I have a lot of yard for the chickens to explore. I have some ideas on how to modify my coop and have read a lot but wanted to ask some experts. I am in Vermont where the weather gets fairly cold. The temps range from negatives in the winter to 80's in the summer. I am on 4 acres near a mountain. I am getting 3 Orpingtons. Questions (answer all or just what you know): 1. Should I remove the green plastic grass from the platform? 2. Where should I fence it? I can cut more openings around the coop. 3. Can I use chain-link plastic coated fencing (I already have a ton)? 4. Do I need to roof the fencing at all? With fence? With tin? 5. I have something I was planning on using as a door for the current openings. It is covered in small wire. Will that be sufficient for my winters? I can also insulate it during that time. 6. Is the small opening around the bottom of the coop ok or should I patch/fence it? Thanks for helping a novice!