Ohhh, at 2.5 months lagiii, 2-3 days baru berak adalah actually quite normal lah, especially if baby minum formula je, formula-fed babies tend to poop less frequently compared to breastfed babies, so jangan worry sangat. A few of my mum friends also experienced the same thing with their babies on Enfalac, and as long as baby tidak tunjuk signs of discomfort, the poop isn't hard or pellet-like, and baby still gaining weight okay, mostly fine je. Tapi if you're concerned ke or if the poop becomes hard macam rabbit droppings, it's best to check with your pediatrician to make sure, especially since it's still early days and you want to rule out anything. How's baby doing otherwise, seems comfortable and feeding well?