The other two pictures are one of a host of similar skulls from a 2,500 year old cemetery at Ashkelon. This dog cemetery was in the back yard of a coastal dog-breeder who no doubt was sending his wares to buyers around the Mediterranean. Ever heard of the Persian Mastiff of Sarabi? That’s a possible progenitor of the Bullenbeisser, which itself is the progenitor of the American Pit Bull. Was this dog even heavier in the jaw than a modern Pit Bull? Certainly. That said the skulls are similar enough that they fall within the variance we might see today within the greater “pit bull-x” community.