While I like the lines, I can't help but nitpick the lore, so sorry, and you don't have to read below if you don't like XD; ---
Kitsune are born with only one tail. Their power is stowed in the tail, and when enough is gathered, it splits to create new ones. One of the few things that stays pretty consistent, from Vietnam, to China, to Japan. While more powerful kitsune parents may have kids with bigger tails to begin with, it would still be a while before they had two, let alone three...
Tails is stated to be a mutant in one of the older cartoons. That's why he leaves to travel with Sonic. He's made fun of mercilessly at home.