I go away for 4-5 days to visit my daughter. I leave my son in charge of covering, putting their
Lights on, uncovering, and giving them breakfast as well as a daily pre made measured snack for them. He can not let them out, but they survive..they aren't happy, but they get over it.
i would never ever leave them completely alone. Just in case they get hung up on a toy, or something happens...