My MIL thinks so! I wish I hadn't listened to her and given in yesterday as the last 24h have been a nightmare.
After 6wks without it, he had weetabix for breakfast followed by pasta and bread for lunch. By teatime, he started acting a bit hyper and by bathtime he was what I can only describe as manic. He was literally clawing at the wall, sofa and carpet and at himself. He then started trying to bite everything and ended up banging his head repeatedly off the wall. By this point I was in tears. We couldn't get him to sleep at 7 and he eventually fell asleep at 1.30. This has continued today but to a slightly lesser extent.
Went to the doctor this morning as I'd been up all night sick with worry but he agreed with MIL that there is no evidence that gluten can affect behaviour. He suggested colic!!! DS is 10mths FGS! So I guess I'm asking if anyone else has experience of this so I know I'm not going mad.
BTW, we started giving him gluten at 6mths and by 8mths I thought he was constantly hyper (though nothing like yesterday) I posted on here and someone suggested removing the gluten. Within a week I saw a difference though nobody (other than DH) believes me.
TIA