Or will it get too hot in there/not enough air? There are 4 chicks, a few days old, the terrarium is about 28" x 12". I have a big box for them when they get bigger, but wanted to know if this would be ok for now (they are in a cardboard box right now). I have a cover for the terrarium which is like a screen door type thing. Do you think that would provide enough ventilation? Thank you.