[Catu]

One thing is that yea, he does get lazy. The first few sits are excellent - quick and clean, butt planted on the ground, eyes up, attentive. But after a few times he gets lazy. I try to keep the sessions short and finish while he's in high drive but maybe I need to keep them even shorter.

Or maybe you need to keep them longer. The only way to build stamina and endurance, not only physical, but also mental, is to work for that.

If all your sesions are perfect, but only 3 minutes long, you can't expect later the dog to do a complete obedience rutine.