Hi, my 5 month is on formula and can normally drink anything from 4-7oz at a feed every 3-4 hours. Last night and so far today he has only been drinking max of 4 oz but spitting up about half of it. He is on infacol as he suffers a bit from wind , he has burped fine at each feed. Anyway I was just wondering if this is normal or should I be worried ? He is not distressed or anything . I have called HV but got no answer so just thought I'd ask for a quick opinion while I waited to try HV again.