absolutely they need clean fresh water every day and they need it in containers like buckets that are big enough and deep enough for them to dunk their entire head into the water.
can you put a bucket of water in the shed with them and toss in some mazuri waterfowl feed (it floats on the water and my ducks love it) you said theyre not eating, but
I hope they are at least drinking water or they cant survive long so they must be?
Im surprized they didnt go for the peas
like...