Ds has just turned 5 and has had a few days of being very poorly with a virus and ear infection, he hardly ate for 3 days and was sick and in this short time he has become skin and bone. He is very slim anyway but this has made me realise that if he were ever poorly for much longer he'd be at risk of getting really dangerously thin. He has some sensory issues so is a very picky eater but on the whole doesn't eat too badly.
Is there anything I can do to help him fatten up a little? I did think of those paediasure shake things but I doubt he'd be willing to have those and they're so expensive!