A barren sow is never kind to pigs.
More Danish Proverbs:
The goose goes so often into the kitchen, till at last she sticks to the spit.Danish
He must keep a sharp look-out who would speak the truth.
Danish
The poor man seeks only a crumb, then finds he still hungers.
Danish
To give counsel to a fool is like throwing water on a goose.
Danish
Ladies have ladies' whims. said crazy Ann, when she draggled her cloak in the gutter.
Danish
Don't sail out farther than you can row back.
Danish