Ay normal lang yan, first time mom! Sa mix feeding, minsan ganyan talaga dahil formula milk, kaya mas mahaba ang digestion, a few of us mums noticed our babies would skip a day or two tapos biglang maraming output, haha! But kung ngayon day 2-3 na talaga siya without poop, or kung lethargic siya or may ibang signs like hindi kumakain well, better check with your pedia na lang para sa peace of mind mo. Kaya mo yan, mommy!