I recently bought an Aussie saddle that came with a matching breast collar. The saddle does slip a bit when we ride, we go on some pretty hilly trails. I've never used a breast collar before, so can anyone tell me how it should fit? Its one that kinda goes around the base of the horses neck and between the chest. How tight should I put it? Sorry I don't have any pics at the moment.
Its the exact one in the first pic on this page: