No I don't make mutliple copies of horses. It's not necessary but I guess it would work.

I usually send 2 emails to the people who request some explation.

The first email explains why sometimes breeding your best horses is not always the best way. Most of the time it will work. But eventually they will no longer improve. The horse's stats will actually capped out and you wont see any progress anymore.

The 2nd email is the actual step by step way of improving it in detail. This is the tedious part of the process.

If you leave your email or you can email me and I can send the first part which should explain some things. It might give you some ideas that you can incorporate into your breeding. The explanation should be enough and you can breed your own way since not everyone would want to do it the way I do it.