Hi

Babies will definitely do much better in smaller enclosures, so don't feel guilty about putting them in a plastic shoe box or critter cage. It's a matter of security for them and they will be insecure and stressed in a cage that is too large with not enough cover. Lots of animals will gobble up small vipers in the wild, so they have the need to hide well. Opaque shoe boxes work great because they feel like they are in their own little niche and they will be more secure and feed better for you. Hope this helps.

Derek