Blind child with weight loss

by debbie
(toledo washington)

My son is 3 years old and has poor weight gain actually lost a pound this last month and has a very limited diet due to his sensory issues. The dr has done all kinds of tests nothing showed up so far. She is now thinking sensory /behavior issues. he was born with septo-optic dysplasia(blind), 9 weeks preemie and meth positive (if that is any help) do you have any suggestions where do we go from here?