At what age do babies grow out of having wind problems?

Hi,
My little boy is almost 14mths old & still has terrible wind at night. He has always suffered from wind & we even changed his formula at just 2mths old. This helped but did not stop it. Through the day he is fine with it & can bring it up on his own with no problems. But maybe 3-4 nights out of 7 he gets unsettled & crampy & really struggles to pass wind or burp. Without trying to wake him completely i try lay him accross my laps on his tummy (used to help when he was younger) & patting his back, giving him some water & walking the halls with him over my shoulder. My mum tells me that he can't have wind at his age & he should have grown out of it at about 8mths. My little man was 5wks premmi & i wasn't sure if thats why he still struggles during the night or if it reflected diet?!
I try give him a healthy diet & he has alot of home-made food.
He starts his day with a bottle, then morning tea, afternoon tea, dinner & bottle for bed. He is on cows milk (still slightly dilluted with water). And he can have any of the following: home-made apple/pear puree, porridge, weet-bix, yoghurt, custard & fresh banana, a variety of biscuits/rusks, toast & home made vegies for dinner. He does not like juices or any flavoured liquids (not even hydralyte or pedialyte). He will only drink milk or water.
I try avoid high sugar foods or junk foods like chocolate, flavoured custards/mousse, chips etc
So my question is... What age do they stop having wind problems? Is it something they row out of? And can it be helped with diet??

Your poor lil man! My DD is 16 months old and she occasionally gets wind pain at night (maybe once a month, if that) and we are up with her for hours trying to help her pass it. She used to have shocking wind pain when she was a newborn, but it seemed to ease as she was eating solids. I think it was the reduction of dairy in her diet. She wasn't having as many bottles anymore, which helped. Now I only give her one bottle at night, and only one serve of dairy during the day, and that seems to be her limit. If anything, the bottles are better than the cheese/yoghurt/cows mill because it's 'cooked' milk and much easier to digest. I also use HA formula which is better for babies that have allergies. So maybe try eliminating dairy just for one week and see if it makes any difference?? Good luck

Thankyou for ur suggestions. He has always had some digestion problems & was late starting solids because he didnt really have the best swallowing reflex's... But we were told because he was premmi to expect delays in his milestones & development. He is deffinately on track with everything else, but still suffers from wind. He self settles almost every night at bedtime, but still stirs through the night. I've tried to let him settle on his own & leave him & sometimes it works... But if he gets to emotional i get up to him. He has alot of high fibre foods which i thought helped with wind as well as constipation. People have told me that because of his age that it isnt wind, its routine behaviour.... but when he stirs or wakes he appears crampy & throws himself back like a newborn & i find that if he does burp or fart, he settles & goes back to bed. I try keep him up for about 10mins after his night time bottle, just so he can bring his wind up. This doesnt always work & i feel that it is becomming more common now.
Do u reccommend trying soy milk or goats milk instead for his bottles & to have with his cereals? Or even back onto his formula? as he wasn't so bad on the stage 2, but very bad on the stage 3 formula. Then to save money we put him on cows milk, as we thought he was ready because he was already having it with his cereals.
He's not a big fan of cheese, but i do sometimes add grated tasty or parmesan to his vegies for more flavour.
Does anyone else have any other ideas??