I work with my horse twice a day (morning and evening).
She was doing really good about letting me put the halter on, but now she just walks away from me if I have the halter in my hand.
She will approach me to see what I'm doing, but once I get the halter ready to put on she starts to walk away.
The most recent thing I have been doing with her is putting a saddle on her back and leaving her tied for a while (no more than 45 min).
I wonder if she just assumes she will be saddled and tied up when she sees the halter and wants nothing to do with it.