WEIGHT AT 15 months

Hello mommies! Bumaba kasi weight ni baby girl from 9 kgs nung 13 months cya to 8.6 kgs now na 15 months cya. Kumakain naman cya ng tama kaso minsan sobrang likot. And di masyadong maraming milk ang na co-consume nia in one drink, nasa max of 4 to 6 oz lang. Any advice mommies?