Last week-end I joined a Yahoo group for Horsfield tortoises (which is what Ruby is) and was devastated to find out that the set-up & viv we purchased when we bought Ruby was all wrong for her. A tortoise breeder said that her shell was not developing properly because of her habitat being all wrong. I was so upset. Horsfield's need a damp humid side at 95 degrees to bask in and a cooler drier end at 70 degrees. It was pretty upsetting and with the support & advice we got online, we totally changed Ruby's environment.
Ruby has loved digging and burying herself totally in the sand/soil substrate.