Which studbook? The one R uses, or the one with A?
If A, do you have a studbook account? If not, you need to, it's $25.
Log in first. Click "find" if you know the horse's reg number (I think that's what you need... I look up by name).
If you just know the name, click "directory"
Pick the letter. For example, we'll look up my mare, Landrys Cowboys Diamonds & Rubys. So click L
Now there are a bunch of names, but hers isn't one of them. Click the name hers would come after. In this case, it's Landrys Black Velvet.
Now more names appear, and I can click on hers.
If R, you also need one, but it's free.
Log in, then on the left click "horses" under "go to"
in the "search for" box, type the horses name
then you have to click "search", hitting enter wont' work
Then click the horse you're looking for
Hope I helped!
Jessi