How big are they, what's the outside temps. There are many things that come into play here. You have 2 and are keeping them together right? I would also suggest posting pictures of both indoor and outdoor enclosures for better help and ideas.
Oh ya, another question I wanted to ask was about outside. I usually put them outside all day with a water bowl and some shade. They seem to enjoy it. Anything I should change about that? Do I need a humid place out there too? ( it is safe from predators because it is covered in a chicken wire type thing. )