I am going to be building a coop in the near future and was wondering if a pop door say 4 feet off the ground with metal sheeting around it so coons and the like can't climb up to get in, if it would be a bad idea. Because I don't know if the chickens and guineas will learn to use it, I really don't want to spend the time training 30 or so birds to use it. Anyone have any experience using a pop door like this? Also if large enough will turkeys and peafowl use a pop door like this? thanks for your replys in advance.