Slightly off topic but why would you have to move your mare so someone can put a stallion in the field? As a stallion owner the other person needs to make sure his horse isn't causing problems. Many stallions won't tollerate geldings and will run them through fences and generaly cause havoc.
There's nothing like the Rockies in the springtime... Nothing like the freedom in the air... And there ain't nothing better than draggin calves to the fire and there's nothing like the smell of burning hair. -Brenn Hill