While I agree on a lot of this stuff, picky eaters are mostly a matter of teaching your kids early to embrace new tastes and foods, I have good friends who have been 'natural' vegetarians even from childhood and yucked at grease and fatty meats - and they have stayed that way until today (in their 40ies and 50ies, respectively).Another factor may be food sensitivities (I am a multiple allergic - I