Babies probably do feel hungry after pooping because a baby usually poops within 5 or 15 minutes after feeding.
However the baby usually doesn't need to eat after they poop and they are not always hungry when they poop.
Your baby will usually let you know when they are hungry and need a feeding by crying so you'll be alerted to the baby needing to eat.
However you should see if the baby needs to eat after 1 hour to 1 hour and 30 minutes because some babies get hungry after that time.
However some babies may not need to eat until 3 and 1/2 hours after they've eaten but your baby will usually let you know if they are hungry and need a feeding.
Babies do tend to poop soon after feeding but it's not always an indication that the baby is hungry enough again to need a feeding.