How do you keep water from freezing for outdoor rabbits?

well, there are many different trough thawers that horse owners can use to prevent their horse water trough from becoming the world's smallest skating rink. Any livestock supply house has a variety of devices you can put in the water trough or in individual drinking buckets to warm the water or take the chill off. These devices can include an electric bucket or tank heaters, propane heaters, and so on. For pastured horses, or for troughs where there's no electrical service, the most important thing in keeping water from freezing is to insulate your water tank. You can get a lot of heat from the ground if the ground is not completely frozen or if the tank is set into the ground. If the tank is suspended in the air, it will freeze quicker, just like a highway freezes faster on a bridge than on the roadway. Even in snowpack country, at the interface of the snowdrift with the ground, the temperature is right at 32° F. Above the snow, temperatures are going to be equal to the ambient air temperature. So, to help keep water warmer and prevent freezing, set the trough or tank low into the ground.