Wow this is the exact topic that we (training group and others) have had a ton of conversations about.
I firmly believe that the best is at least 3-4 hours between getting the dog out of the box. Your window of oppertunity for learning is VERY short on these dogs - 5-10 minutes MAX they are attentive and ready to learn. You have to make use of that attitude and mental process of the dog when he is fresh. Doing difficult, mentally demanding things with tired dog is not advancing the dog as much as you think. You are better served doing two things a day Am and Pm than 10 things in two hours.
PLENTY of programs that back this up.
I firmly believe that the best is at least 3-4 hours between getting the dog out of the box. Your window of oppertunity for learning is VERY short on these dogs - 5-10 minutes MAX they are attentive and ready to learn. You have to make use of that attitude and mental process of the dog when he is fresh. Doing difficult, mentally demanding things with tired dog is not advancing the dog as much as you think. You are better served doing two things a day Am and Pm than 10 things in two hours.
PLENTY of programs that back this up.