First, I am posting these with permission of the photographer.
She does a lot of horse shows and riding events and sells to clients.
One venue she is shooting at has a bright white building behind the arena and there is really no better place for her to shoot from to get the action shots she wants.
She is concerned about shooting in raw as it might take too long to load and edit files for the clients to see.
I'm not a sports/action photographer so told her I'd ask here. I've even suggested she join up so maybe we'll see her, I hope.
The first is the unedited and second is the edited that she did.
Fill flash is not possible due to distances involved and fear of frightening the horses.