My BB also had similar situation a week before. He cried whenever we hold him horizontally and we need to sooth him for a long time until he started to drink (seems that he knew we were going to feed him). But he didn't drink too much even he was willing to drink. I was very worried at that time because he didn't look hungry even after 4 hours (and also even after 8 hours when he woke up!). We gave him some InfaCol (medication to reduce wind problem; prescripted by our doctor before) and he is much better now and drinks milk as usual.