Have a technical question you can't find the answer to in FAQ's? Ask it here. Game problem questions that do NOT pertain to things like training advice, what would my horse do well in, how much is it worth.
Better Breeder - New foals have a 5% chance to ignore 'birth caps' in a stat
That bonus allows foals to be born above BC
If you're dealing with an uncommon breed and you "break the BC" it only counts if the foal/s have been born on a ranch without this bonus. Otherwise it is considered an above BC foal.