OOOH YOU'LL OPEN A CAN OF WORMS REGARDING HALTERING.
I NEVER EVER leave a halter on any horse (exception Mare for a couple of days after foaling if they are a bit sticky to catch) - but ESPECIALLY a foal.(They can easily get their legs caught up in a halter)
Yes I train them to accept a halter - not till around three weeks and OVER TIME - getting them used first to pressure release using just your hand - and then a soft rope over the neck ALWAYS allowing the foal get away if he needs to. (Actually he never even tried as there was no stress for him - it was all a game.
I don't hold to the theory that you should hang on to the foal no matter what as this can lead to serious injury to the foals delicate neck. If you want to see how this is done in pictures here's a link... The Growth of Lord LubbaDuck AKA Zephyr Moo
There are quite a few of our training sessions pictured here.
We NEVER use force of any kind and the training sessions were NO MORE THAN 10 minutes at any time.
I now have a beautifully behaved happy little 4 month old (today!) who leads anywhere, picks up his feet for the farrier (and myself of course), is now float trained etc.
A lot of what I did was experimental as I had never bred a foal before but having rescued many horses over many years I knew exactly how I did NOT want him trained.
Hope this helps