And guess what? I figured out how to view my mare's BLUP. If I go to cover her and choose a horse, and the part where it shows both horses with all the statistics before you confirm it, it shows her BLUP. Even if I'm under 10 days registration! And she's already at -1.56 BLUP, I found out! Yay! Once it's at 0, all I'll need is another 100 to go!
