Found our second set of twins this morning, both ewe lambs (hurrah, no castrating!). Both were vigorous and suckling. Put them in the bonding pen about 7am. Others have been over to check on them during the day, but when I checked this afternoon, they had very clean bottoms. VERY CLEAN! One seemed to have a little tiny black bit stuck there and the other had absolutely nothing although her bottom looked normal. It's not that I like the sticky yellow stuff, but I expected it. Both were seen to suckle and seem sturdy enough. Do I just have a very particular mum or should I be worried?