Karen,
My taste changed (ever to slightly) almost weekly so I recommend you encourage him to keep trying and re-trying soft foods. But, during the first month I really didn't eat much -- mainly still, like during TX, just small helpings of soft stuff like puddings.

I was told if I could drink water, juice and eat a couple pudding cups a day that should be enough to keep my throat and swallowing working.

I drank a lot of juices like grape and berry juice.

Getting back to eating somewhat normally took me about four months and a times was really a downer. Then, after a month or so, at time it was kind of an adventure. My progress seemed slow.