What do this horse 'letters' mean?

Sire = Father

SS = Sire's Sire

SSS = Sire's Sire's Sire

SSD = Sire's Sire's Dam

SD = Sire's Dam

SDS = Sire's Dam's Sire

SDD = Sire's Dam's Dam

DSS = Dam's Sire's Sire

DS = Dam's Sire

DSD = Dam's Sire's Dam

Dam = Mother

DSS = Dam's Sire's Sire

DD = Dam's Dam

DDD = Dam's Dam's Dam

D - Dam, S - Sire, so DD would be dam's dam, SS would be sire's sire, DSS = Dam's Sire's Sire, DSD = Dam's Sire's Dam, and so on. I don't know why they didn't just build a bloodline chart, instead of trying to spell everything out like that, wow.

Ed to add: take a look on Allbreedpedigree.com for an example of a chart. If your horse is't there, you can use "Face This Investment" to take a look at it.

unknown

some stallion got with some mare made a baby and sold the baby without a birth certificate

Yes, all would be some unknown bloodline, stock horse grade, mutt

Not that its a bad thing, mutts make great horses

Some of the best horses I have had were mutts

Someone trying to pass this off as a family tree for sale purposes?

If so, now that is a new one

What is confusing about it? No bloodlines for the sire, No bloodlines for the Dam and no birth or death dates for any of them. It means the horse is a grade horse whose age and bloodlines were never kept up with, neither were his Sire's or Dam's. You see this a lot on Pinto papers. Sire is the Daddy, Dam is the mother.SS is the sires sire.SSS is the sires sires sire or sires grandfather. SD is Sires Dam. DS is the Dam's sire, DD is the Dam's Dam. Hope this clears it up for you.

I think sire is something like father, and dam means mother - you're looking at a horse's family tree.

not sure