We have such healthy soil without pesticides that our worm population takes care of our poop as long as it is liquified enough for them to eat it. If there is too much poop and not enough dirt and worms you may not have healthy soil. You can always add worms to do the work. Once the liquified poop has soaked into the ground, and duck poop is already pretty much liquid already, there is no mess and the clean topsoil dries quickly. If the soil gets too saturated with poop it takes more water to wash it into the soil. We get alot of rain so the process happens naturally all winter, I just help it along during dry weather.
It could take time to get your soil loaded with worms but the moist dirt should attract them. If the dirt is too dry they may not be as active because they need to stay moist so they will seek out moisture. We have so many worms now that I can see their dirt plugs where they have been actively feeding. We also have 3 Worm Factory bins to feed worms our coffee grounds and food scraps (that don't go to the chickens) since my husband drinks a pot of coffee a day to medicate his ADHD.
It could take time to get your soil loaded with worms but the moist dirt should attract them. If the dirt is too dry they may not be as active because they need to stay moist so they will seek out moisture. We have so many worms now that I can see their dirt plugs where they have been actively feeding. We also have 3 Worm Factory bins to feed worms our coffee grounds and food scraps (that don't go to the chickens) since my husband drinks a pot of coffee a day to medicate his ADHD.