I discovered this morning that my DP fed our 11 month old son a yogurt for breakfast that had past it's sell by date 5 days ago. Now, he's very opinionated on the use-by/sell-by date thing, and insists on ignoring them (he thinks it's a conspiracy to get us to eat more...). I think this is fine if he applies this rule to himself, and he knows his body is fine with it, but I feel fuming that our poor son, who has had a raging temperature for 5 days, diarrhoea for 4 days, and is really quite poorly, has been given something that's potentially going to upset his tummy even more. I wouldn't be so annoyed (but I would still be a bit cross I think) if he weren't ill, but the fact that his system is already compromised and now he's having to digest something which potentially could compromise it further, really annoys me. AIBU?