Choosing the best milk for a 4 year old depends on your child’s overall diet, growth, health, and individual nutritional needs. Most healthy four-year-olds who eat a varied diet do not routinely need toddler or growing-up formula. Plain pasteurized cow’s milk can be a suitable choice, while fortified, unsweetened alternatives may work for children who cannot or do not consume dairy. This guide compares cow’s milk, toddler formula, and plant-based drinks, explains how much milk preschoolers may need, and covers added sugar, bottle use, picky eating, and signs that require advice from a pediatrician or pediatric dietitian.