Also make sure you protect the hutch against the wind with old sheet/blanket/duvet over the hutch(but leave a gap for air to breathe)?
Please check water bowls and bottles regularly, as they will freeze quickly in these freezing conditions.
If you think it's freezing cold out there - so will your rabbit(s)... do please nip out and check them?, especially before you go to bed, as temperatures drop even lower during the night.
sue
