Breastfeeding is always a very important factor for the baby and mother and  many times there are some problem faced by mother because of either wrong position while feeding  lack of proper diet stress related factors. A proper is counselling is required which can be done by a lactational counsellor along with a proper diet with plenty of liquids some supplements may be helpful like shatavari . Also try to avoid giving top milk in initial stage specially with bottle feeding which may be the culprit for lactational failure most of the time .

In my Opinion continue to breast feed as low milk supply occurs due to reduced bF . One missed feed will affect the next feed milk supply

Bottle feeding is not at all safe Try to give breast feeding only. If at all needed, give with katori and spoon