how many gallons of water can a horse drink???
This probably means carrying a bucket of warm water out to your horse. How often you make the trip depends how much water the horse will take in before the water chills or freezes. Studies show that an idle horse requires a minimum of 10 to 12 gallons of water a day. But each horse is an individual--some horses might need more; others, less. So, again, you have to watch for signs of dehydration.