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.
There's no shortcut to it, as far as I know! The way I do it is through non-stop prepping and rolling which definitely gets tedious but those bonuses are worth it!
I, of course, spent a good hour yesterday maxing a horse to enter into gym events xD Ah well. I'll get working on some other stuff this afternoon. The gym events are filling so I should be able to run them basically on time and can make something more useful for my other eventers.