"But I see your point... I can't really vouch for HorseHawk/Belinda's character like I can Susan's, because... look what happened when I emailed the owner of her stallion's sire and asked about HERDA."
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If you go back & re-read what I said, "TO the best of my knowledge". I was told by some close friends that all her horses had been tested. I called her myself after your post to confirm. Gena said that they probably thought all had been tested because of having the one done, they assumed Twister was done too & she had talked about getting him tested the same time as the other stud but wanted to wait till the processing fee went down on the HERDA test. As she had heard it was going to be much cheaper in the near furture.