5 Month is really gassy only at night? Won't sleep!

Hi all! My 5 month is having a lot of distress only at night with gas. He's fine the whole day... then when my wife will feed him on the breast and put him to sleep and then he'll wake up like 10 minutes later, arching his back and farting up a storm. We try to massage and move his legs before bed but this doesnt really change anything. Literally nothing will get him back to sleep but feeding again, and then the process repeats. He won't calm down if we rock him or walk him around, or sing, etc. What usually happens is we'll do try all that stuff for like an hour and a half and then give in and feed him.We know he has issues when my wife consumes dairy at all, and she has cut that completely out of her diet. She also stays away from 'strong' foods like garlic, asparagus, turnip, etc.The odd thing is he's fine the entire rest of the day. Even at his nap, when she feeds him the exact same way he'll go down and sleep for a solid 2 hours and not wake up. There's nothing we can think of that is different from the night time that would be different to give him so many problems...We're kind of at loss and no one is sleeping! Any tips? via /r/Parenting http://ift.tt/2bws7k7