Frame can hide, but not generation after generation of non cropout, non double registered AQHAs... His owner didn't test him for OLWS because he is not at risk of it. He has a five panel test for applicable issues, all negative. My answer stands. This thread isn't about breeding an APHA Frame mare to a AQHA stud, if someone wants to open that one up it's an interesting debate. I feel there is no risk, my trainer and the stud's owner feel the same. I'm the one breeding, and I have no worries. But to each their own. Here are some of the stats on this.
Testing of OLWS foals, their parents, and unrelated horses revealed that all OLWS foals had two copies of the defective gene, their parents had one, and unrelated horses had none. Simply put, if carriers are never again bred to each other, there can never be another OLWS foal born. Horses at greatest risk of carrying the defective allele are overos, particularly of American Paint Horses and American Miniature Horse breeding. A small number of Tobiano and breeding stock horses also carry the defective gene, and a very small number of carrier horses have been detected in other breeds.
Copyright © 1996-2000 American Association of Equine Practitioners. All rights reserved. Overo Lethal White Syndrome - AAEP
OLWS Overo Lethal White Syndrome (OLWS)
Horses that carry this gene are most commonly overo white patterned horses (frame overos), but there are exceptions. The defective gene has been found in American Paint Horses, American Miniature Horses, Half-Arabians, Thoroughbreds, and cropout Quarter Horses (foals born to registered Quarter Horse parents that have too much white to qualify for registration with the American Quarter Horse Association). https://sites.google.com/site/painth...gends/genetics
Now perhaps this thread can return to the OP's topic.