I wonder if we subconsciously think about calling dogs/using their names a lot, but when we name cats we think more about their color, personality, names that we've always liked, etc.? While my cats do come when called, I don't think that is a thought when naming a cat.
Oh, you reminded me that I forgot to count my Komondor, Beau. He was papered, so had more than one name, but we just called him Beau.
Love All Life, Thank You For Posting! :)