Horses require between 5-15 gallons of water per day. If possible, make sure that your horse has access to water at all times. 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. Keep the trough clean as well by hosing it out every day. Structural carbohydrates, like hay and grass, are essential to a horse’s diet. Horses eat large quantities of hay and grass as their main source of food. In fact, horses should eat about 15-20 pounds or 1-2% of their body weight in hay every day, so make sure that your horse always has plenty of hay to chew on. Make sure that the hay you feed your horse is free of mold and dust. Nonstructural carbohydrates, like oats, corn, and barley, are also essential to a horse’s nutrition. Provide small amounts of grain to your horse throughout the day. Every day, horses can also have ½ pound of grain per 100 pounds of body weight. Feed grain to your horse in two or three evenly spaced feedings during the day.  Make sure to measure the portions that you feed your horse to make sure that you are giving her the correct amount.  If the weather is hot, feed grain to your horse during the cooler hours of the day, such as early in the morning and later in the evening. Although your horse will get most of its calories from hay and grass, you should feed your horse some fortified feed each day to help meet any nutritional gaps. Protein, fat, vitamins, and minerals are important parts of your horse’s nutrition, but they are not required in large amounts. If you think your horse is not getting all of the necessary vitamins and minerals from feed, then you can supplement with special vitamins for horses. Just be careful not to overload your horse with too many vitamins. An excess of vitamins can cause problems just like a deficiency of vitamins can. Giving treats to your horse when you want to reward her is a great way to bond with your horse as well. Just...

How would you rephrase that briefly using Vietnamese?
Cho ngựa uống nhiều nước sạch. Cung cấp cho ngựa đủ số lượng carbohydrate cấu trúc. Cung cấp nguồn carbohydrate phi cấu trúc cho ngựa có chừng mực. Thêm chất bổ sung vào chế độ ăn uống của ngựa để cung cấp protein, chất béo, vitamin, và khoáng chất. Khi cần thiết bạn có thể sử dụng chất bổ sung. Cho ngựa ăn thức ăn vặt có chừng mực.