My 13 month old is not all that into eating. About 2 months ago he finally started putting things in his mouth (food and non-food), but he primarily eats purées and yogurt. He will eat finger-foods like puffs and bread, but will mash soft foods like bananas or sweet potatoes and not eat them. He still drinks about 18 oz of formula a day and I'm reluctant to switch to whole milk, just because in concerned about his nutrition. Does anyone know how the "toddler formulas" like Similac Go and Grow compare to formula? Is that a reasonable next step or just a waste of money?