When it comes to proper feeding, your horse needs plenty of room for his food, and you need something that is easy to transport and clean.
Things to Consider:
Flexible -- Larger buckets that are made with flexible materials can be handy for holding any large amounts of food or supplies, and are great when it comes to storing or stacking.
Feeder Ring -- If your horse's feed is ending up more on the ground rather than in their mouth, a feeder ring placed on their dish can help keep spills from happening.
Large and sturdy -- For storing large amounts of water, a sturdy feeder tub works well not only for your horses, but also other animals around the house. The are difficult to dump over, and can stand up to chewing well.