Decrease appetite

My daughter is turning 1 tomorrow. Over the last 2 weeks, idk if I should say decrease appetite. Usually during mealtimes she eats a certain amount of food. But lately she eats less during mealtimes but snacks more in between. Snacks will be her biscuits/puffs or fruits. Her milk intake is still like usual, 200-220ml every 4-5 hours. Is that normal for appetite to change? Will her appetite return like normal? Generally she's not a picky eater. She just eats more frequent in smaller portions.