Nut allergies are usually diagnosed very early, so everyone who has it should be aware of that.
I never met anyone allergic to nuts, but I turned allergic to chicken after 30 years (probably they just started putting penicillin based antibiotics on it, since I was already allergic to that, who knows)
How about organic chicken? Plus isn't it illegal to put antibiotics in poultry now?
It is probably illegal, but it's Brazil here, the law isn't respected as it should. Cheaper brands of milk were caught putting caustic soda and water in it, for example.