Hello, I just purchased a new home in southern BC and we have a large hedge of cedars lining the back yard. The Cedars are maybe 12 ft tall. The yard slopes from right to left and we've noticed the cedars at the lower edge are dying. After taking a better look I've noticed the neighbour behind us has placed Irish Spring soap bars in stockings every 6 feet to deter deer from eating the hedge. Would this soap be leaching out and flowing to the lower trees and causing them to die? Any help would be appreciated. Thanks ps I attached a couple photo's of the hedge.