Right I asked my HV about this today... she said I'd done all the right things as far as feeding (eg making sure he's getting the hind milk etc)
Trouble is, he's only put on 4 oz in 2 weeks... I was so surprised, Mason was always huge and Brody is looking the same, very chunky with chubby little arms)
In her opinion, and it was something I was definitley suspecting: he wants me as his dummy
She explained about their sleep patterns, I'll pass on the info now incase it helps anyone:
They have a 1 hour pattern, the first half, light REM sleep, then they go to deep sleep for a bit then come back up to light sleep. When they are in light sleep, they can sort of mentally "check" to make sure everything is as they left it. If they are used to going to sleep alone in their cot, then they don't wake, as they are still in their cot, so they go back down into deep sleep.
If, like Brody, they are at the boob when they fall asleep, he will wake up and want to be on the boob again to fall asleep cos that's what he's used to.
This is why he's waking upevery hour / hour and a half, every cycle he falls asleep on the boob again cos I feed him every time he wakes in the night.
I have got to not let Brody fall asleep on the boob, even in the day time, as this habit he has now has to be unlearned.
Wish me luck!