Lisa Ann,
Contact Dawn Winkelmann, Speech Therapy and Feeding Pathologist. She is in Newport Beach, CA. and does work with people at a distance. This is a serious feeding issue with this child. I have seen a times Methyl-B12 injections help, but not consistently enough not to have someone like Dawn intervene. Here web address is http://www.SpectrumSpeech.com. What they cannot afford is to have the child become even more restrictive.
Sincerely,
Dr. Woeller
P.S. syringe liquid can be an issue if the child has a swallowing issue or strong gag reflex.