Asking this for a friend so if you need more info please bear with me!
Her DD is almost 4 months and is on 4 8oz bottles a day of hungry baby formula. She was a nanny quite a few years ago and remembers being taught very clearly never to give a 9oz bottle, so her dilemma is whether this is a bad thing to do or if it is old advice (she trained in the days weaning was advised at 3m).
She says she knows the obvious solution is to add an extra feed, but she is very reluctant to do this as her DD is in a really good routine which works for her - and her DD suffers very badly with colic and reflux if not managed well, one thing which helped was giving her bigger feeds less often, so she is worried that introducing another feed might set off the reflux again.