They will be fine.    

Just give them crushed dried orange peals, like 5 grams per day, but not all at once. Like split it in two, and put like 2.5 grams of the powder in 300 ml of water (make sure is some good water, something with low parts per million particles or some mineral). Also before doing that crush like 500mg of vitamin C (ascorbic acid), and also add some 50 < > 200 mg of magnesium carbonate. And for kids I recommend you do combined with orange juice. Disclaimer: DO NOT BUY PESTICIDE TREATED fruit.