Developmental leap...teething...thirst - especially if he is having less milk due to favouring solids to fill up on. I know if I have an out and about day and R is too distracted to BF properly then she will wake during the night for a drink.
Thanks everyone. I am thinking perhaps it is thirst, I'm having a hard time getting milk (bm or formula) into him during the day. I might go back to offering milk before every solid meal. Might try the porridge closer to bedtime as well.
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