Bred by Mr and Mrs Horace W Gregory Jr deceased 11/7/02 per 12/02 ARABIAN HORSE TIMES obit Reported to be a CA carrier. It is possible that he spontaneously developed the mutation during embryonic development. Extensive research on the Ca carrier list has failed to show any other cases in his parentage and as popular as his pedigree is, it seems likely that some other carriers from his lineage would show up. -David Matlack, DVM