My 4 yr old granddaughter lives on Fast Food practically, And is a picky eater too, You won’t get her to eat fruit, few veggies. Wants chicken nuggets,
24 states have been hit with Bird Flu, and the FDA lets the amount of bacteria go higher that their set standards.
If you have a Oestopoath or Natrual Path that specialises in vitamins/minierals, I’d start there. Iron https://www.verywellfit.com/foods-high-in-iron-2507744
Add blueberries, Dark Cherries, and cranberries they are high in oxidents.