Have you tried things like watermelon or other juicy fruits in a mesh bag feeder? He can then suck them and get the taste but no swollowing... DS liked that concept a lot... Took a bit to get him interested in the mesh bag and sucking, but using things like pear and watermelon were good... I also used two fruits from a can, as they have a lot of juice (i know there is sugar) but it helped get him interested and then i switched out to real fruit...