naw, I wouldn't think its a crazy thought of the mountain or kemmer cur to be involved in the manufacturing of the yeller bmcs. but if mnt curs were used, wouldn't at some point in the generations of breeding, brindle bmcs would arise from the depths of the gene pool?
this topic I would think would go back a similar topic a while back, asking what dogs made up the bmc line. nobody could seem to answer the ? of, what dogs made up the bmc, with any 100% certainty.
during the westward expansion, im sure ranch dogs were mixed and bred with numerous "breeds" of dogs along the trip, and during these breedings, possibly before there was a true name given to any 1 type of breed a bobtail dog was used or got ahold of their dogs and 2 months later, that gene was in the "bmc" line of dogs.
im sure you have ran across this link and if so, sry for posting it.
http://www.blackmouthcur.com/History.htmI can NOT find ANY info other than the link I posted, to truly say what dogs made up the modern yeller cur, which still leaves the bobtail gene origin honestly unanswered.
I do know that some registry owners will take any ole' "cur as they call it" and throw it in their breeding pool just on ther dogs looks and or performance and now that dog is a bmc, yet other registries will register the dog/s IF you can provide a 6+ generation breeding linage of the potential bmc candidate along with pics of the linage and some form of documentation as proof of the generational breedings
I to would like to know, but with so many of the antique old timers passed away along with their knowledge, its gonna be near impossible to pin point the exact dog/s used to the throw the bobtail trait, EXCEPT for modern medical science and a DNA profile of the dog breeds.