My 2months 25days old isn't taking her formula properly recently, she is on formula and breastfeed (but milk supply is less).She takes only 400-500ml per day

A. Namaste Mom, That is fine, as rest she is taking your feed as well. so over all check her monthly weight gain as well, as monthly it is expected to gainin range of 400 gm to 1 kg and by age of 4 to 6 months they double their birth weight