Winter water tricks. When snow is not too deep, keep grazing on the ground and grazing on stockpiled grass/clover and
feed green kale, rape, cabbage, rutabagas or other standing stock piled or row covered crops that are full of moisture already.
I only kindle from early spring through fall and have all my growers dead and in the freezer or can by now. I only maintain next years breeders. By doing this, I have virtually no water needs until I have to use dry
hay or alfalfa cubes during deep snows or ice storms. In that event, I use large ceramic dinner plates and let them freeze. I place the frozen shallow ice plates in with the rabbits that easily chip up and eat the ice off of the plates. I still feed rutabagas, daikons, cull carrots and apples, and green tops and vegetable waste/peelings to really reduce water needs. My wife gets mad because our large, deep fancy dinner plates make the best ice feeders/waterers!
I also group all of my dry does into one of my large grower ground-hutches. The smart does show the dumb ones how to eat snow and ice, and create competition to eat
root vegetables further enhancing natural moisture intake through feed. If I am real concerned, I can give a large crock of warm water to my grouped dry does in the morning and let them have the ice plates ad lib.
Remember, wild buns have no access to liquid water when it is below hard freezing weather, and depend on plant moisture, snow and ice! They are not lactating, and they are not eating un-naturally dried rabbit pellets or dry hay. If you can get wet feeds into them and don't have to kindle in winter, you can save yourself a great deal of work by only having to offer liquid water once a day at worst. The ice eating keeps bored buns from chewing on each other or on my
wood framed ground hutches!