The best by far is deer netting... If the year is rainy and abundant dear will be selective... if it is a drought dear will eat mostly anything... piss works but it's something you have to maintain as it washes away... best I ever used as a maintenance is raw eggs... beat an egg into a gallon or 2 of water and keep it refridged,,, fill a spray bottle and spray the plant and the area weekly and after a heavy rain...