Maybe the wind direction was the reason they sprayed North South and not the other way but there was barely any noticeable wind. Maybe I am making a big deal out of nothing but I'm still a little mad about the trees on my North fence line being killed when that neighbour was dessicating his crop by air last year. 
Regarding how high in the air my yard extends? Well I'm guessing some of you might complain if I flew my drone a hundred feet high over your yard taking pictures without permission. And I doubt many even know I have cattle here unless they break out into their crops. And hopefully that has not happened yet.