but about the igloo; isn't the point of them so that you can see into them? I mean, what if one of your hedgehogs injures him/herself while they're in there? you won't know until like the next morning and that might be to late to save it, ya know?
The hedgehogs won't use the igloo when they're seethrough because its not dark enough for them. They sleep during the day, so the light seeps through the plastic.
I check the hedgies every morning anyway, so regardless of where they sleep, igloo or hedgie bag, they'll be checked in the mornings. There really isn't a lot to get hurt on in the cage either, only the wheel which is 100% hedgie safe.