Well, you said you worked with him and he was much better - so are you looking for advice or just opinions?
I found out my mare was terrified of whips, she would get SO tense when she'd see one. I worked with her for a looong time (so long that I'm still working with her on it, LOL) but she still has never truly gotten over it and to be honest, I don't think she ever will.
I've just tried to desensitize her to it, rubbing it all over her, swinging it over her head, etc. I can do all that now, but not with her being relaxed and I won't stop doing it until she IS relaxed. I don't like the thought of my horse thinking I'm going to whip her anytime I have a whip in my hand (I guess that is backwards thinking of some people, but...that's just not me). I need to be able to use a whip to train her for things, tricks, loading on a trailer (which she does but with a littttle hesitation, but if I used a whip she would RUN on and I don't want that), lunging, etc.
I'm just going to keep at the desensitizing until she is relaxed around the whip, though I truly don't believe she'll ever be over it 100%.
passion is when you put more energy into something than is required to do it. it is more than just enthusiasm or excitement, passion is ambition that is materialized into action to put as much heart, mind, body and soul into something as is possible. // <3 starlite - dream - lady - georgia