The narrowing cat-dog gap looks like a move toward pet equality, but a new gap is rising -- a gender gap. I was fascinated to see that female pet names are trending human much faster than male pet names. The numbers in the previous paragraph showed that 72.5% of the top pet names are common human names. That turns out to break down to 50% of male names, 95% of female. Whats more, single-sex pet names are soaring. The fast-falling names are full of unisex classics like Snowball, Lucky, Whiskers, Pepper and Shadow. The fast-rising names names are almost all sex-specific. In fact, for dogs even the hot non -human names are ultra-macho ones like Diesel, Tank and Thor. Apparently, we want to be secure in our dogs masculinity. Looking Past Looks.