worried sa pag poop ni baby

normaL ba na 1-2 days bago mag poop si baby ?? mixed feeding pero once or twice a day Lang ung formuLa miLk nya pero hndi naman matigas tiyan ni baby tapos pag nag poop na sya hindi naman matigas poop niya .. pa heLp po ano need gawin share your experience na din po TNX iN ADVANCE po