Update! Despite my horse being on Ukulele copper supplement since November, and despite his pretty excellent nutritional intake (is fed a diet balancer to weight and workload, formally analyzed his grass pasture last year will again next month, formally analyzed his diet), the soil was analyzed, and the bleaching is right on schedule! His black points are not bleaching but the rest is. We’ll see if his mane and tail turn orange now since significant growth has occurred since November.
My vet is still not concerned. Horse lives in his own very well cared for 1.3 acre pasture 24/7.
I have friends at a nearby Lusitano farm who also tried Ukulele this year to prevent bleaching, we will compare notes.
Just wanted to update those who suggested copper supplementation last year. I did it, still see bleaching.