I moved some ewes with lambs onto fresh pasture on Sunday. Today I have noticed just one lamb (just over 8 weeks old) with diarrhea. It's down his tail and back end, and whilst I was cleaning what I could with a tissue (I'll wash him down properly once I have a hand later) it started coming out of him again like water. There's no mucus or blood, just very runny poop. Checked the other lambs and all have clean bums. Have noticed the ewes poohs have gone pretty runny and I'm putting this down to the spring grass. Assume it is the same for the lamb? If so do I need to do anything extra for him?