Originally Posted by KissTheRing
Once the bridle is on leave it there a couple days- Take the reins off and let the horse get use to it.
I wouldn't do/advise that in a pink fit! I do this with a halter, but only one tied on with half thickness balers twine, so if they get hung up it breaks easily without hurting them. I do agree with just allowing them to wear a bit for periods of time to get them used to it, but would never leave them unsupervised, or leave them wearing a bit long term either - ouch, the pressure on those uncallousable mucous membranes of the bars!
Agree with Hangin & Prinella about getting them used to the headpiece. If the horse is too uncomfortable with that to begin with, I'd start just desensitising him to rubbing the strap across his eye & ear first. Also agree with cory that c/t tactics are invaluable.