At other times the pigs must be taken in and kept on the owner 's land , with the exception that pregnant sows , known as `` privileged sows '' , are always allowed out providing they are not a nuisance and return to the commoner 's holding at night ( they must be `` levant '' and `` couchant '' there ) .
At other times the pigs must be taken in and kept on the owner 's land , with the exception that pregnant sows , known as `` privileged sows '' , are always allowed out , providing they are not a nuisance and return to the Commoner 's holding at night .