We know that exposing babies to foods that are potential allergens early and often can help reduce the risk of baby developing allergies. And we know that healthy fats, vitamin D, and protein are super-important for baby's development. Feeding your baby salmon as a first food is one of the healthiest options out there. Just cook it, mash it, and mix it with some liquid (if needed). Just watch out for any bones, and your baby should become a little seafoodie in no time!