It is completely normal. Some babies (even formula fed ones)do poop after every feeding
Frequent pooping (up to five or more per day) can continue even after a year of age.
If your baby's stools are consistent and baby seems happy, then you don't need to worry.
Sometimes a baby that has often bowel movements may suffer from diaper rash, but this is easily taken care of with just a little diaper cream or Vaseline (petroleum jelly).