I never ride without spurs...... all my ponies are trained to spur stop so I use them a lot. I think that if you ride her around at home for 2-3 weeks in them she will become acustomed to them. You can not just assume that she will be fine in them though, she has been broke for 2 years (assuming that she was broke early in her 2yo year) and you claim that she hasn't had spurs on - she may flip out. Although you say that she was trained VERY well so I can only presume that this was done professionally so I think that it is very likely that when she was broke she would have had spurs on her.