I'm planning on building an outdoor habitat for my tortoise and bearded dragon and I have a few questions. 1. Can they be housed in it together? I only have enough room for one outdoor habitat and if the bearded dragon can't be with the tortoise a few hours out of the day then they will sawp off. It is around 6 feet long and 3 feet wide. 2. There are a lot of hawks where I live, will they pose a threat to my animal(s)? 3. How high should the walls be and what should they be made out of? I was originally going to use chicken wire that had very thin holes but when the bearded dragon uses it he will be able to climb out.