I have 4 kits that are 6 days old and 2 of them seem to be trying to burrow out of the nest. I have found them a couple times near the front of the nest box nestled into the hay. I have been checking them every morning and peek at the box several times a day. Their momma is so tolerant of me. They are in a climate control environment so they haven't gotten too cold on their adventure (thermometer on belly is my guide, compared to kits in nest) but I am worried they get too far from the nest they will miss a feeding or get squished when mom hops in.