Hi, my dd1 had Aptamil for hungry babies and was very badly constipated.
With dd2 Aptamil didn't suit, so now we are on Cow and Gate 1st first milk for am and pm and Cow and Gate 2nd milk (for hungry babies) at night time and it works for us.
Just a bit confused so are you using Aptamil for hungry babies in the day and Omeno (sorry spelling) in the evening? I'm sure Omeno Comfort can make them constipated does it say on the tin? So, maybe using these both together my make the constipation work. It may have to use the Aptamil First milk with the Omeno Comfore. Also, if he suffers with wind have you tried the Dr Brown bottles, as this helps. Also about an hour after a feed have you tried giving him a baby message there are certain tummy strokes that you can do that help wind. Have you tried Colief?
Just thought if you are in the uk most surgeries will offer you free baby message classes. Also if you ds suffers from wind badly you can get Colief on prescription as it costs about 10 pounds per bottle.