We have a lot of what looks to be Eastern Black Nightshade growing in the area where our run will be. Everything is really small and seems to be just sprouting. Is there a way to rid of these within 2 weeks, without spraying weed killer, and it be okay to put the chickens out there? Or do I just have to till the whole area? Is the plant itself poisonous or just the berries? Would it be okay to put the girls out there and let them have at the seedlings?