I have been wondering if a dogs ability to keep a hold longer has to do with bite wotk or just with the dogs wind (stamina condition), I ask this because as I have been working out my dog he has been able to keep a hold, way longer than before when I give him some tugging play. Yet all I do for his work out is walking, running and sprinting, I only give him some tugging play every once in a while.

Would like to see your opinions.

Jon