Nice hogs! 
Even though the parents are all show-bought, is there a chance (considering a range overlap) of a possible inter-breeding somewhere in the genetic history of one of the parent snakes? As unlikely as it is, it could explain the unusual eastern-pattern that may have finally come through? Just a thought - and if it is possible, you may be able to add a new "pattern-morph" into the trade if you can get that pattern to show up several more times, I think its rather neat to see that pattern on a western.

