Thanks Fleecewife
Yes I thought about the freezing issue after the last 2 months here when as I filled the chicken's Eton drinker, which I have hanging in their run, formed pretty icicles underneath in about 10 minutes! Luckily they're not far from the house!
Apparently you can get a heater thing for the Eton drinker so I might try that next year.....
I use a big tripod drinker for the ducks in their run but that did keep getting frozen so I used the BEC trough I have for them as well when they are outdoors, ( not at present poor things
) and it stayed frozen free amazingly.
All in all buckets are def the way to go sheep wise