Summarize the following:
Horses that consume an excess of grain feed are more prone to laminitis. Remove your horse's grain feed and restrict its access to grain pasture to help manage its laminitis. Instead of offering your horse copious amounts of grain feed, provide lots of hay instead.  Make sure to choose good quality hay for your horse. Giving your horse more hay allows it to eat more volume and stay busy while keeping its calorie and sugar consumption low. Hay is a healthier option than grain, so your horse can eat more of it. Your horse needs to consume 1.5% of its body weight in hay each day, unless your veterinarian recommends otherwise. Your horse's hay contains fiber, but this type of fiber may be more difficult for your horse to digest. Beet pulp provides your horse with an easily digestible source of fiber, which is important for preventing laminitis flareups. You can use it as a 1 to 1 replacement for part of your horse's hay.  Soak the beet pulp in enough warm water to cover it. Soaking the beet pulp makes it easier for your horse to chew and it may taste more appealing this way as well.  Beet pulp is a byproduct of sugar production, but it is not sweet at all. Many horse owners advocate offering canola or soybean oil to your horse in place of grain feed, especially for horses that are prone to laminitis. Make sure to gradually introduce oil into your horse's diet as you eliminate their grain feed.  Plan to give your horse 3.5  fl oz (100 mL) per 220 lb (100 kg) of body weight. For example, if your horse weighs 880 lb (400 kg), then give your horse 14  fl oz (410 mL) of oil daily. Divide the oil into 2 to 3 servings added onto your horse's hay or beet pulp. For example, if you need to give your horse 14  fl oz (410 mL) daily, then you could divide this into two 7  fl oz (210 mL) portions.  Ask your horse's veterinarian for a specific recommendation for your horse. Allowing your horse to roam a lush pastures and graze freely on the grass may seem like it would be good for it, but it may lead to a laminitis flareup. Limit your horse's access to the pasture during daytime hours, and only let it graze between 3 am and 10 am.  Make sure that the pasture is not dense with lush grass. This will lead to overgrazing. Put a grazing muzzle on your horse to prevent it from grazing too much.

Summary:
Remove all grain-based feed and replace it with hay. Ensure your horse gets enough fiber by offering beet pulp. Supplement to your horse's diet with canola or soybean oil. Avoid letting your horse graze freely.