No, never. The barn I work at is only 8 acres with 20 horses. Needless to say we have all dry lots. Each paddock is average 100x100 with 2-3 horses in each. They get 3 flakes for breakfast and 3/4 for dinner, plus their grain rations. That's it, depending on the weather of course. My friend also has her horses dry lot-ed in smaller paddocks and she feeds two flakes breakfast, lunch and dinner in slow feed hay nets.
Slow feed hay nets are a dry lot-ed horse's best friend. You can even double bag it if they are eating to fast through it. Also, toys come handy! Look up the amazing graze (cheerios work well in here) and uncle jimmy's hangin' balls. Both are excellent at keeping bored horses busy. Posted via Mobile Device