We are planning on attaching our run to the coop soon with a chicken door, but need some ideas on the best way to go about this. A few questions would be: How to make it predator proof? Any advice from past experiences? What should the dimensions be? I know I have a lot of questions...maybe it is not as complicated as I think it is (still a newbie). Also, if you have any pictures of your door, that would be really helpful. Thank you so much!