How long do you actually hunt from putting the dog out to stopping for a long break or for the day?

I ask the question as a friend and I were having a discussion on how long a dog should actually hunt well on early season prairie chicken. I saw two to three hours as a reasonable standard, he believed a good dog should do more.

Maybe I am soft on my dog, but I rarely hunt her more than half a day.

Michael Dittamo
Topeka, KS