I researched quite a bit into this before Zephyr was born.
I think the imprinting such as Dr Robert Miller does is excessive and unnecessary.
I was at the birth and handled him gently from the get go but did not restrict him in any way. I was merely another presence and part of his life from the start.
Every day I handled him short bursts of around 10 minutes (NO LONGER) several times a day.
He is now 7 months old and the friendliest, most inquisitive (read nosey) happy little chap around. He gets very excited when I go out to see him and often brings me stuff - (Twigs, his ball etc) to show me.
I'm very happy with the way he is developing. He has been allowed to be a HORSE FIRST - personally I think this is important