>>14976496That's cause cats and dogs are kind of lumped together in Japan. For example their most common breeds of dogs are pugs, and the shiba inu, which looks so much like a cat. Not to mention slanty eyes.
Entei is a Shishi, which is just a mythical, giant, lion-like take on the Pug.
Raikou is much like a Sabertooth Cat, which is a predecessor to both Cats and Dogs.
And Suicine is based on a Shiba dog.