Oh, the things strangers say to parents!
Nursery worker: Well, I was VERY surprised that Amelia had nuts in her diaper bag for her snack. I wouldn't think she'd be old enough for those yet.
(Possible interpretation: Wow, you REALLY don't know what you're doing, do you?)
Me: Actually, she does very well with nuts, and we already tested her for any allergies to nuts, and she can eat them! I was so relieved that they aren't a problem, since she needs the protein in light of the (previously mentioned) allergies to eggs and dairy.
(Interpretation: I've got it, thanks.)