I went to an obedience seminar just for the heck of it, and I was informed that the only reason that shock collars work so well in the retrieving game is because Labradors seem to gladly take shock corrections. That they don't seem to resent them the way other dogs can. There could be something to this? It could explain the rise of the Labrador as the top competitor in field trials at about the same time that the e-collar was being developed. Anyone care to comment or disagree?