I was waiting for that arguement. And yes, I run a low 4 ,40 still at the age of 28.
Tell you what. To save me from having to do alot of typeing. Take a pen dog and a woods dogs to the woods(or pen) and dump them out this afternoon. Tell me what dogs drop out first.
That's an easy answer... the pen dog will drop out first.
The key to running dogs in this heat is conditioning... lots of running which can't be done in a bay pen.