My 4.5 half month old won't sleep without me feeding him to sleep. He cries like crazy when I put him down or hold him in cradle hold, but when he's upright he's too interested in everything to become drowsy. He continues crying louder and louder if I try and comfort him. I always have to feed him to sleep, even I give him a big feed before naptime. He won't take a dummy.
Any advice?