I don't disagree with the health visitor that he will soon need to eat more calories as he is starting to get more active BUT there are good and bad ways to increase calorie intake, and I'm not convinced that sponge cake and custard is the right way! I don't want him to end up being addicted to sugary foods, or not eating his veggies because he knows something nicer is on the way.
To be fair to the health visitors, they don't know me from Adam... I could be completely clueless and just feeding him on wotsits and cups of cold tea, or hardly feeding him anything because it's too much like hard work, in which case sponge cake and custard is probably a reasonable suggestion.
But... we're not giving him sponge cake and that's that! (meanies... )