Clara, just replying to your comment that you think you have made alot of mistakes with halter training , please dont think that. You are making great interaction with your foal which is great . I have a little mare who is 9 and was very much left for her first 5 years. The only interaction she had with her owners was that they would rush her into the corner of a stable to have her feet trimmed and now she suffers from major trust issues. Being that the only interaction she had was such a rushed experience for the first 5 years, its no wonder she has the issues that she does.
Once on the lead she really is a sweet mare , loves to be brushed and doted over. Its getting close enough to her to apply the halter that is the issue. Normally she will approach me and then realise at the last second how close she is and flip out. She has been like this since she was sold to the lady before me.
As you can see everyone has different ideas regarding halter training , But we all agree that some interaction is necessary early on
By the way he is very cute ( and not shy of the camera )