Girls, I think the milk is watery. The baby seems not to be eating wel…

Girls, I think the milk is watery. The baby seems not to be eating well. I feed him every hour or half an hour again wants to eat. Born weighing 3200 grams. Seems like he's still small. The pediatrician advised us on "Malutka" formula. What do you think is better for a newborn? What would you recommend? We gave Malutka. But it ran out before we could finish another one, I wanted to ask for advice.