Iron deficiency used to be a big issue among toddlers, but it’s estimated that only around 10 percent are still clinically deficient, which can result in anemia and even developmental delays. Still, if your kid drinks tons of milk and/or is a particularly picky eater, it’s possible they’re not getting the recommended 7-to-10 mg per day. If you’re worried about it, the best source is from meat and seafood. If that’s not happening, move on to egg yolks or broccoli, asparagus, brussel sprouts or spinach – because you know who wasn’t iron deficient? Popeye, that’s who.