  A hen should only be broody for the time it takes to hatch her eggs, 21 days. However there are extremes. The commercially bred egg layers of today rarely go broody an … d if they do start they may stop at anytime, 2 day, 2 weeks.f you mean during the time in which she is trying to hatch chicks,  then the maximum amount in which she can leave her eggs for a quick  break is about 1-5 hours at most, d … epending upon the temperature  and surroundings where the eggs are.