https://www.andyspetshop.com/blog/?p=595
Dogs breeds with skulls short front to back (if you want to get technical, “squashed”) are called brachycephalic and mostly start with “b” or “p”. Coincidence? You decide. Boston Terriers, Bulldogs, Bichon, Brussels Griffon, Boxers, Bull Mastiffs, Pugs, Pekingese, and Presa Canarios are brachycephalic.