Suddenly very fussy at 1 year old! K. KNP2611. Jan 29, 2022 at 7:47 AM. Something in my son’s world absolutely shifted as soon as he turned a year old. Prior to that, he was the chillest, calmest baby. He’s about to be 13 months and now he seems to be upset at *everything* . Upset when we feed him, upset when we take away the food he isn ... More @Wikipedia
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