It is not good for babies. There are many Iill effects like diarrhoea, cough , improper dentition, habit formation etc .If baby is not getting enough milk from mothers breast feeding and you have noticed less weight gain in the baby , then there is no option but to give top feeds . A better option to bottle feeding is feeding with a pallida. This does not cause nipple confusion and all the other ill effects of bottle feeding .
Health Tips
Consult a lactation consultant to see if mother can get supplements to increase her breast milk