HGG Community Forums

Remember, even though you can only test against one parent, both parents contribute to the “average” that the foal must be near to not be snipped by BA. (That’s why when you bootstrap with a nice lined stud against foundation mares most of the fillies will be snipped if you test them, even though they’re definitely superior to their dams. They’re not close enough to their sire’s quality.)

My theory without seeing the foal in question would be that the dam is of better breeding quality than the sire, and so even though the colt tested superior to his sire, he wasn’t close enough to his dams breeding quality to remain intact. That can happen even in evenly bred horses with the same paper levels; all the levels have a pretty large range of quality within them.

Edited because I thought of this later:
If you want to test this theory and have some GMTs to burn for curiosity, you could ungeld him, change him to a filly and test him against his dam to see how he measures up.