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My 6-week old 34-weeker started out on Special Care 24-cal formula while still in the NICU. Because that formula is not available outside of the hospital they sent her home on Similac Neosure formula, which I mix to a 24-cal recipe. I also have to fortify my breast milk with it. Both formulae contain milk and soy. Since she came home (at 2 weeks old) she seems to have developed a problem with bowel movements. After red-faced grunting and straining all day with little more than gas to show for it, she finally starts crying in the afternoon. She will cry or scream for a few minutes, bending and straightening her legs, and then relax for a few minutes, before starting up again. This cycle finally ends (sometimes not until the middle of the night) with a humungous bowel movement (or two or three w/in a couple minutes of each other), after which she goes to sleep. In the middle of all of this, she is frantically hungry and her hands and feet get very cold. She will occasionally have one or two smaller bowel movements throughout the day with no such issues. Is this colic, or a lactose allergy, or...?