DS3 is 5mths.. i have started him on farex.. he...

DS3 is 5mths.. i have started him on farex.. he is fine with it and has no reactions.. i thought about feeding him at nigth to help him sleep better.. he currently wakes constantly ..about 5 times a night with wind and stuff.. and has to be b/fed to sleep.. if i feed him at night can this help his sleep better? have you had any experience with it? he has a late sleep about 5pm for 1hr then goes back down about 8.30 and is up about 5-6am