I am the proud owner of a 7 month old sulcata and a 4 year old russian. I wasn't sure about putting them together, but it couldn't have been a better decision. They sleep face to face, eat together and seem very content. I always thought they were solitary creatures, but I don't believe that anymore. My sulcata is more adventurous than my russian, but he has lived with me since he was a week old, while my russian i beleive grew up in the wild or at least not in close contact with people. I can't wait for it to warm up so they can go outside! Patrick is my sulcata (may have to be changed to Patricia when he gets older) and Teagan is my russian.