Alamak, biasa la untuk baby breastfed, sometimes boleh skip a few days sebab breast milk very efficient, tapi kalo baby tetap aktif, happy, and wet diapers okay, usually fine je. Kalau anak mu nampak uncomfortable, perut bloated, or takde poop lebih dari 3-4 hari, better check with the pediatrician sebab di 4 bulan dia mesti regular still. A few of us noticed our babies had weird patterns bila campur susu tepung, so monitor closely la mana dia prefer more.