Hey I've been thinking about getting either a russian or a hermann tortoise from the upcoming convention here in San Jose California. My question is, would I be able to keep my hermann or my russian tortoise in an outdoor enclosure with sufficient substrate for the tortoise to burrow in? The weather here usually is about 60F at night and on winter night it goes as low as 50f but above 40F. Would I still be able to keep the tortoise outside at around 40F 50F if i give it burrow option or should i bring them in for winter nights? When it drops below 50F