Here is what I've found after many years of trying it all. It is not a matter of loose or rough. It is a simple matter of better dogs. I've found that dogs from great stock working familys have the inbred instincs to know when to get rough and when to be loose. They come here knowing how to work stock. The burning desire to stop an animal thats leaving the herd or running off is also bred in them. To be a top stock dog, he also has to be very fast and athletic, which comes in handy stopping a runner. With all that being said, everyone gets outrun sometimes and you can't catch them all.
as perfectly said as anyone can touch on it.. and couldnt have come from a better source