Pros and cons of pushing a dog in training.

As with most things, it's not black-and-white. Some dogs benefit from more splitting, patterns, higher rate of reinforcement, and easier training sessions with less puzzling than other dogs. Those dogs might benefit from more lumping, more behavior chains, and more unpredictable/challenging training sessions with plenty of puzzling. In all cases, you need to watch your learner to determine how your interventions are being received. As a general rule, force free trainers err on the side of patterns and high rates of reinforcement for too long, making behavior chain goals hard to reach, and balanced trainers err on the side of the unpredictable and challenging training with too much frustration and lack of clarity in the work. You could pick your poison, or better still, watch your learner carefully and pick that just right path!