Normal lang yan, mama! Formula-fed babies often poop right after feeding kasi ang formula ay mas mabilis ma-digest compared sa breastmilk, so trigger agad ang bowel movement, that's the gastrocolic reflex at work. As long as ang consistency ay normal (soft to pasty, hindi hard o watery), ang color ay yellowish to brownish, at walang signs ng discomfort like excessive crying or bloating, then okay lang talaga, pero if worried ka pa rin or may changes sa pattern, better ask your pedia para sa peace of mind.