So, to move on from Shakespeare to a more prosaic note ....... A lamb will pass a long string (like a necklace), of brown poo soon after birth - this is the stuff that's been in its intestines pre-birth and you often won't see it as it'll get trampled into the bedding if lambing inside. First few days the muck is mustardy yellow and sticky - think of the richness and colour of colostrum and you can see why. You need to check the anus is it can dry quickly and get mixed in with bedding material and form a "bung" which will need removing. Then it becomes darkish brown and more formed but still soft as they're not having fibrous food. If this changes then alarm bells should ring! Most common is probably coccidiosis - the dung is watery and a drab, almost greenish brown, around the same tone as khaki. It will spread around a wider area below the tail and the inside of the back legs. This will quickly kill a lamb - a dose of Vecoxan will stop it fast if caught straight away.