except all dogs are canis familiaris (i cant spell this :/ sorry) and are not naturally occurring, they were selectively bred. There are subspecies of wolves after the grey wolf (canius lupus) the mexican wolf, the red wolf, etc.
Dwarf retics and the locality boas are naturally occurring animals that differ from their larger counterparts in more than just size. Most of the locality boas i know have very specific scale counts that set them off from BCC/BCI. We didn't breed them for that, they came that way already. There are other snakes that have locality and specific species differences (think about kings and greybands).
I think there is definitely a case for reclassification, but theres a lot of stuff that needs to be done in the interim methinks.