I didn't weight him but he is getting skinnier and has been eating much less since more than a week. Bottle fed and from taking 7oz every ,3 hours except for the nights where he sleeps 5-7 hours with no feeds to 4-5 Oz every 3-5 hours. Not hungry. Have to feed him in 2-3 goes as he stops after 2-3 Oz. Is this normal? Does it mean he needs weaning? Getting concerned now. Thanks