I'll add my two cents on the babies. No idea how old they are but first, bless your heart for taking them in.
If they have no mentor models where you live that are safe enough for them at their ages to help them model appropriate behavior (no idea how old they are, at what age they were orphaned, you're it so I'll just assume they are pretty much wild babies and go from there).
I agree with loosie on letting them make the first approaches, and I think your best bet is to "unlearn them" about the haltering and start over to re-educate them on coming to you with no hesitation whatsoever, and that means making every approach on their part positive. Because they're orphans they'll need a bit of wide berth on what is and isn't appropriate for a little while, they aren't big enough to hurt you although you have to watch for baby antics LOL, and most of those self-correct once you have their trust and can do about anything with or to them without halters, lead ropes and whatnot.
They will naturally turn and face you when you have their trust and ask for their attention when it's needed and/or appropriate, as their mentor. It will come naturally as part of their instinct :)
You may need to separate them, possibly, either on a daily basis or for a period of time while getting them to fully engage with you. Great way to bond and help build their confidence and trust is to sit on the ground and be lower than they are, you aren't so frightening then. Be passive, let them sniff, taste, nibble gently on you, hang out with them and show them you aren't a predator LOL.
Bribes are good, making meal times and massage/scratching/bonding times fun and mixed in with very brief lessons such as using brushes, then lead ropes and halters to massage and rub on and around them to rid them of any fear of them, running hands down their legs and scratching, being careful not to tickle - babies' attention spans are quite short so keeping lessons not serious as well as short is always a good thing. You sort of have to be half horse and half human but it's tons of fun and so rewarding!
Last edited by DRichmond; 09-06-2012 at 10:56 PM.