“Lie down!” I’d yell, immediately following with “Lie DOWN! LIE DOWN!” In no time at all, I had trained Drift, my first Border Collie, to lie down to, and only to, “Lie down, lie DOWN, LIE DOWN!” For all I know, he was waiting for the full signal before he responded, since there was no way for him to know what the basic unit of the signal really was.
