"While all asses can come in the spotted pattern (“pinto”), the term American Spotted Ass is a trademark for those donkeys (asses) registered with the American Council of Spotted Asses (ACOSA), which is trying to establish foundation stock for spotted asses. For those interested in genetics: At this time, it is not known if the spotting gene can be homozygous (SS) as in the horse tobiano, as spotted jacks and jennets are still seen to throw non-spotted (solid) foals, meaning they are still heterozygous (Ss) for spots."
Amy Elizabeth
TBN Ranch