My 9 mnth old baby has recently gone onto formu...

My 9 mnth old baby has recently gone onto formula and now that he is fully formula fed he has the worst poos and farts all the time. At night time he really seems to struggle with wind and has been waking up just to wriggle around and arch his back and then let's out some farts before finally settling back to sleep. I have been giving him Karicare gold because I gave it to my first son and he was fine on it. I don't think it is agreeing with this one though! Has anyone else had this problem with formula or know another one to try? Trying to avoid buying lots of tins. There used to be little sample packs in the supermarket but I haven't seen them lately.