DS3 is 15 weeks old and bottle fed and over the last few days has become increasingly unsettled having previously been the most laid back, chilled out baby in the world 
He was previously feeding every 3-4 hrs (except in the night as he sleeps from around 7.30-7.30) and taking about 6oz. Over the last week I've increased that to 7oz and now 8oz.
Tonight he had 8oz at 6.30pm but just now (8.15pm) has woken up and drained another 4-5oz and he's doing this more often as the days go by.
Luckily it's not affecting his nighttime sleep and he still goes through but I do think he's getting hungry.
Obviously don't want to start weaning and it's not that desperate but just wondered if anyone had experience of going onto Cow and Gate for hungrier babies? Is there any reason that I shouldn't switch to this? Would it make him constipated?
I know all babies are different so noone can tell me how he'll react but just wondered what others have found.
TIA
Gobby