Shoes Blues

Answer me this: how is it that in the current world market, with such a ridiculous surplus of goods available, I cannot find shoes for Abby? There must be literally thousands of styles available in her size. Dozens in one store alone! And yet she's like my own little reverse Cinderella--NONE work. I really do not understand. Are her feet misshapen? Unusually unweilding? We're going to have to move to Florida so the girl can wear flip flops year round.