I would steer clear of ANY preservatives in a bubby so tiny - like others have said I can't have 220 either I get a massive headache...

Oats can also be a problem - some people cannot tolerate oats so it could also be that...

You can get naturally dried fruit that doesn't use any "numbers" to dry them. I use these in my hosue as the whole drying of fruit scenario is pretty unhealthy if you read up on it...

Maybe try him with natural oats - just 100% oats - if he still has the reaction I would say the culprit is the oats... Otherwise it might be the dried fruit and preservatives... HTH