Reaction from dairy eaten three days ago?

[beckington]

Does anyone know if behavioural reactions to dairy can happen three days after dairy was ingested? My son is allergic to dairy and was given a dairy ice-cream on Thursday by mistake and I'm trying to figure out if stuff happening today could be connected. (He certainly hasn't been a 100% joy the past few days, but that can happen without the dairy, you know!)

Thanks!

[mamafish9]

Yup. Does in our house!!

[beckington]

Thank you, that's good to know! Here's hoping this reaction ends quickly!