my tortoise Tilly is about 8 and I adopted her in September of 2018 my cousin no longer wanted her I’ve never owned a tortoise before her so I’m new to this so please help me out. Tilly this morning went into the part of her enclosure this morning that has no heat lamp ( for reference she lives in a tortoise zoomed inclusure, I know she needs a bigger one but that’s what I received when she was adopted so this summer I’m building a new one) she has been sitting there ever since this morning now her shell feels cold and same with her body she ate a little less then usual but nothing alarming please help