My baby girl is exactly the same. Full feed till burp is bout 110-120ml. That only happens during growth spurt or feeding break into 2 session within 1 hour frame. Always drink half then stop.
She was 5.8kg at 3mths and now 7.5months around 6.8kg only.
Active and skinny and super easily distracted and playful.
Infant care teacher finds it easier to feed her cereal but too much cereal constipating. Trying to strike a balance here and there with fruits, water etc.
(Mind you she is on breast milk still constipate that shows how little she has been drinking).
Now worst she is teething....when she cranky dont know is it wanna poo or gum pain....grrrr