Sahib, it was not a personal remark, you just reminded me of a point that I wanted to make earlier.
I've just seen parents take things like the picky-ness of their child to have more significance than it really deserves. Unfortunately I have also seen parent's succumb to the wills of the child to only eat what he/she likes all the while claiming that it's because of some condition when really it's just the kid wanting what he/she likes to eat. One of the children in my mother's class would only eat jellybeans. The parents would feed the kid jellybeans because that's the only thing the kid would actually put in her mouth. She also had a feeding tube installed because the " mental health system" couldn't get her to eat anything else either. If you tried to give her anything else, she would throw a tantrum which would last for quite some time. The parents obviously would do anything to keep that from happening but as a team that has seen that and much more, time and time again, my mother and her team just wrestled through it all and found ways to "trick" this child into trying new foods. I say "trick" but it's really less negative, this kid could see that you were going to try to feed her with something other than jellybeans and would close her mouth and tighten up like a knot! I don't know all of the details but it involved making things look and taste like jellybeans and then lessening the amounts of sugars until the girl would eat a few more normal things. They never did have her eating veggies and drinking milk before her family moved away but it was a good start. In this case it was actually more of a behavior modification than anything, not only for the child but for the parents too because when they saw that it was their daughter choosing to be this way, they changed their habits too.
Riggler:
I've seen it first hand, children form different social bonds with other children than they do parents. I suggest using animals as therapy too. Autistic children always open up around animals and doing things like hippotherapy seem to really help. It has to do with the overwhelming sensation of being around large animals it seems. Their rhythmic movements, warmth, strong heartbeat and their sounds seem to make such an impression that brain activity goes through the roof. I would suggest this over any pseudo-medical treatment any day.