My chickens just received the second dose of worming medication today for an infestation of roundworms, visible in the poo as dead worms. Now I moved all the chickens to another run so that the first run can be washed clean by our rains. I want to put them back in after all the worm larvae hatch out and die. I know that after 10 days the new ones have hatched. Do the larvae die quickly with no host? But my question is, if I leave the run empty for a month, will there still be roundworm larvae in the soil? Is there any point in waiting a whole month rather than, say, a couple of weeks? I did do a search on BYC and couldn't find the information.