Write the next sentence in this paragraph:

How to feed a horse 
Provide your horse with plenty of fresh, clean water. 
Horses require between 5-15 gallons of water per day. If possible, make sure that your horse has access to water at all times.

pick from the following.
 --You can purchase containers to water your horse at the store, or make a makeshift water trough for feeding your horse in the barn. Horses need about 100 gallons (24 square meter) of water per day, which is roughly one gallon of water for every 500 square feet of pasture..
 --If you do, feed your horse from a trough and a bowl of water whenever possible. When a horse needs a water source at all times, place a trough or bucket on a clean stable floor or other surface for to splash water onto..
 --Horses do best drinking over the summer, when temperatures drop below 40 ° f (21 ° c). A healthy adult horse will drink at least two gallons of water each day..
 --Otherwise, make sure that you water your horse at least twice per day and allow several minutes for your horse to drink. Make sure that the water in your horse's trough is clean and not frozen..
Otherwise, make sure that you water your horse at least twice per day and allow several minutes for your horse to drink. Make sure that the water in your horse's trough is clean and not frozen.