L.O.
has your son refused the stage 3 foods??there isnot much difference in the 2 and 3 food in the fruits or veggies.. the dinners are chunky in the 3s.
My daughter ws a terrible eater as a baby..but she did much better later she was still on babyfood at 14 months.
she liked canned fruit cut up small. sheliked peas and green beans.
just keep trying foods - put them on the high chair tray eventually they will eat them.