Originally Posted by MisssMarie
Someone had said she only had PB on one side of her pedigree so I went with it because it just depends in the persons meaning. She was PB up until a certain point - she is an appendix Quarter horse tho
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It's a common misconception that only full quarter horses are afflicted or are carriers of this disease. If PB is anywhere in the pedigree, even 20 generations back, the horse could potentially be a carrier and if he's on both sides you double your chances and the horse could be afflicted as well. This mare is appendix but she still has QH both top and bottom. (unlike an appendix that has one full TB parent). Both QH trees go back to PB so genetically, she could either be a carrier or afflicted. We have carriers and are producing afflicted horses in every breed that incorporated QH blood. Paints, Appies, spotted drafts, the color breeds (ABRA, palomino, pinto...), grades...
I still don't grasp what you're trying to explain with the "Poco blood does not come from PB" but trust me, anytime you see "Poco" in a AQHA pedigree, it will always go back to Poco Bueno.