Yes, the problem is he's too young for milk, not the taste. There are actually many foods that take time before a digestive system is developed enough for them (such as oatmeal and cereal, biologically terrible "first foods"). Soy or goat's might by good substitutes, even lactose intolerant people can drink goat milk because the proteins are different. In fact, babies generally have hard time breaking down fomula because of the lactose, which is why they stay "full" longer on it. Some can't drink it at all unless it's soy based.