Ah, normal je tu! Babies sering grunt dan straining like that, especially when they're trying to poo or just adjusting their tummy, doesn't automatically mean constipated. A few of my mum friends pun pernah worry about the same thing, tapi their babies fine je. If your baby's poop is soft and coming out regularly, nothing to worry la, but if anak you memang takde poop for a few days or keras sangat, better check with the doctor to be safe, okay?