Answer: Hi dear, we all have this doubt that if baby's tummy full or not and we sometime try to either force baby to take more or stop before the tummy full.
here are few signs I have listed as per my experience with babies:
Closing lips. Just as a hungry baby suckles readily, a full baby zips his lips, as if to say, "No more, thanks."
Turning his head away. A more forceful version of closing his lips is to move his entire head away from the food source. If your baby turns away from your breast or a bottle, you shouldn't force him to eat.
Decreasing or stopping sucking. Some full babies will stay latched on to the nipple but not suck any more—at which point, it's time to gently end the session.
Spitting out the nipple or falling asleep when full. After about 15 to 20 minutes of feeding, a full baby will often act drowsy and may even fall asleep.
Showing increasing interest in surroundings rather than eating. At around 4 months old many babies begin to get distracted during feedings, as their awareness of the world around them grows. A hungry baby will put this curiosity on hold long enough to feel sated. When he begins looking around more distractedly, it's a sign he's had plenty.
Answer: Hello! As your baby grows, your baby sucks more milk in a minute then it used to do when she was few days old. Hence, they easily fill their tummy. To find if your baby is getting more milk or not, then the urine count should be more than 6 times during the day. This shows if the baby is getting sufficient milk.