I just got some month old lambs a few days ago and now two of them have dark green scours. Before I got them they were on goat milk and starting to eat grass and hay. I transitioned them to lamb milk replacer by feeding part goat milk and part replacer for the past few days and letting them munch on our pasture about an hour total a day. Yesterday one lamb had dark green diarrhea and now two have it. I gave the one lamb a homemade electrolyte mix (from Storney's Raising Sheep book) and some pepto bismol but the scours haven't gone away. The lambs all took active, energetic, and hungry despite the scours. Any suggestions???