RE: fast dog
My Springer hunts fast as well. This is his 4th year and he gets excited when he knows he's going hunting.
I try to let him run before we hit the field to try to take the edge off.
Later in the day, after a few hours when he's more tired, he seems to be a better hunter. Moving slower with less distraction.
That being said, even though he is a fast hunter, his style is to immediately backtrack, even a few steps, when he picks up the scent and gets birdy.
This is definitely my queue. I read him well and enjoy his dedication and the fact that he is relentless.
Good luck to all.