Most babies gain around 4-5 kgs in the 1st year of life. Most of the babies double their birth weight by the end of the 6th month and treble their birth weight by the end of the 1st year of life. From then on, the growth rate dramatically decreases, and most babies gain only somewhere between 1-2 kgs in the second year. Because of this drastic reduction in the growth rate, appetite also dramatically comes down. If they have 1 feed, they may skip the next 2 feeds. If they have feeds well on one day, they may skip the feeds altogether the next day. Most parents get worried about this phenomenon. As long as the baby is active and growing well, parents can comfortably ignore this.