We're in a training rut. He is easily distracted, and after about 5-10 minutes loses interest in retrieving dummies. For the first few minutes, he does well, responding to directional commands "over" to the left and right, short blind retrieves, and does well not breaking. But, then out of nowhere he decides to go off on his own program. Am I overestimating his attention span? He is about a year and half old yellow lab, neutered as well.
Do we need to get back to basics? I know this is a broad question, just looking for some advice. Thanks.