Is it common for breast milk fed babies to be chubbier?

Yes and no - depends on the genes - depends if the mother's milk is fatty enough - some mothers are overweight so their babies then to be really v v chubby tho fully on bm. My boy is on mix since day 1 and slightly more fm - weight always abt 75 percentile during the first 6 months. After that they get more mobile so it starts to lose the baby fat. Not necessarily to aim for chubbier baby yar?