I agree that's a very stupid and lazy way to do things. But some people (and horses) are just lucky. My neighbor use to just throw his horses out to pasture from a dry lot, or go from pasture to dry lot from one day to the next. My first two horses use to belong to him, so they were treated like this too. Feed and hay change was one day to the next. None of his horses ever coliced or foundered from it. The only reason one of his mares foundered is because she got into the feed room and ate almost 2 bags of sweet feed by herself. It's gets so irritating when you see people like that have no problems, but your horse almost dies even though you're doing your best to do things the right way.