thats to bad. Hope they didnt lie about anything else. Thats why its always a good idea to go out and see the horse a few times before making a purchase. You might see things that you hadnt noticed or that were not visible the first time around.
AS it has been said tho. The horse industry, especially where I am is VERY close nit. Everyone knows someone who knows you or your horse and it's a lot more difficult to conceal things.
More and more people are going out of country to get their new mount to not have to deal with those strings attached.