Zucchini causing explosive poos?

Today we travelled to Otaki to see Blair’s Mum for her birthday. I’d started giving George some zucchini earlier this week. On the way we smelt the most hideous smell from the back seat. George had had explosive diarrhoea that covered him right up to his armpits. We’d never seen anything like it. It smelt tremendously vinegary. Looking at photos from yesterday and the day before I can see George’s skin is beginning to flare again, especially on his temples and forehead. His cheeks are also red and beginning to look quite scaley.