Hi. I have recently acquired a 16 year old Hermann's Tortoise. She has lived outdoors during the daytime and indoors in a vivarium all her life. How traumatic is she likely to find it if I move her to a table? I'm worried that if I change things she may find it stressful? I live in the Midlands. When I turn off the heat lamp at night will she be warm enough in a table? Obviously at the moment the enclosed vivarium retains heat overnight. Thank-you.