my baby is 6 months old. she is on formula from the age of 1 month. she used to drink formula through bottle. since last 2 months she is not even drinking with bottle during she is awake. we have to feed her once she falls asleep. once she falls asleep she sucks very nicely, but when she is awake she won't suck even if we give bottle she will chew on nipple but won't suck. kindly suggest something because if she is hungry and not sleepy we have to make her sleep and then feed her, managing which is very tough.