When their environment is disrupted & altered you set into motion a whole new "pecking order." They have to go thru what reptiles are simply not good at & that is reprocessing themselves into a whole new environment. You may think you've suddenly provided a better place for them, & maybe you have, but those little reptilian minds don't know that. When you disarrange their kitchen & bedroom furniture, so to speak, you also disarrange their mental processes. In their natural environs they can go a life time w/o much in the way of ambient changes. Compare that to a life of enclosure stresses. Just my 2 cents...
Dan