I've been playing Howrse for a large number of years, since 2008, to be exact. I dropped off and on for awhile until my account was hacked and deleted.
I'm back now with a strong case of nostalgia and little patience for the limitations that the new players have, even though they are completely reasonable. :D
As far as breeding stock is concerned, this game is more of a hobby. While I will try my best to reach 100% bulp and increase the future potential in my lines, it is likely to take many months to years.
Enjoy!