I built a planter for Mr. Tibbs where I can take him outside and there are grass, and wildflowers to eat. I notice that he is super active outside, browsing, digging, walking all over the place. In his tortoise house, he is not very active, even though I have the temps up and he has a good basking area. Do I need to make his enclosure more fun, adding plants or something, or is the enclosure too cold? Temps are in the 80s and Basking area is 93-100. He walks around a bit in the enclosure and then either burrows, or hangs out under the basking lamp.