S.W.
I don't want to scare you, some children develop sensory issues and will only eat foods that are a certain texture or taste. Since your son is only 15 months old you could talk to your pediatrition and see if they will refer him to First Steps (A Federally Funded program that provides evaluation and therapy for children birth to 3 years of age). The therapists work with children who have developmental delays and sensory issues. Cardinal Hill - (A rehabilitation hospital located in Lexington, KY) has a program for picky eaters. You might find information on the computer. I have a couple of friends who are parents of picky eaters. One of my friends has a child that refused to eat anything except chicken nuggets for about three years. It nearly drove her insane.