I have lots of poison ivy plants near my chicken coop. I’m wanting to spray the plants to get rid of them since we’re working on clearing out that area (next to the coop). But if I buy and use a spray from the store... wouldn’t those chemicals hurt or kill my chickens? Just from the scent of if the wind took some of the spray to the run area. Any suggestions on how to get rid of the poison ivy without hurting or killing my girls would be appreciated!