lambs with scours

Hi! I brought my three lambs home yesterday and since then have noticed one with a couple of symptoms I was hoping to address. One of our girls had her poop change from normal, to round and clumped together, to a greenish pile of mush over the last 24hrs. This evening I have seen her squatting...

We have 5 lambs with 2 ewes born in January and one has a case of scours. I have read a number of threads on kids with scours but so far have not found one on lambs. We washed his bum yesterday and gave him some kefir mixed with water and lamb replacer powdered milk. He had diarrhea again...