Would it be okay to move 2 hens from a large rabbit cage to a 4 by 1 / 3 by 2 vivarium? One of them recently broke their wing and we suspect it was from catching it on the bars of the cage they are in now. They both get outside regularly to fly/move around. Viv is ventilated in the back and has two glass sliding doors in the front. I would put a tray down on the inside to help with cleaning but all hides, sand ect would fit in fine. Is this okay to do or not? Thanks!