>>>> not to belittle all of the research done in these posts but the simple statement would be:
>>>> If a horse, any breed has IMPRESSIVE in it's bloodlines, it could potentially have HYPP. So if a person has a horse, that is IMPRESSIVE bred, then be sure to test it for HYPP. It's an inexpensive test. If your horse does test NH or HH, then don't breed it.
But the statement regarding what breeds HYPP is present in is still not accurate. Purebred Arabs are not at risk for HYPP, and posting things that suggest that they are is not helpful.
Also, there are many horses in many breeds named "Impressive" or with the word "Impressive" in their name that are not related to the AQHA horse Impressive responsibile for HYPP.
Why not take an extra minute/write an extra sentence to make the statement accurate, to avoid confusion and mis-information? Heck, you see from just this thread that there are people that will take it to extremes and avoid the QH and related breeds altogether, just because HYPP exists in one bloodline.... what if people start avoiding Arabs altogether because they read that "HYPP is getting into the Arab registry".... or they avoid Arabs and Saddlebreds and Morgans and Thoroughbreds because they read "any breed where Impressive is in the bloodlines is at risk for HYPP".... since all of the above breeds have individuals in their registry named Impressive....?