It's really obvious with our dog. As a puppy we could walk for an hour, or even more than 5km, and at home he'd still be a rambunctious little pest because he

It's really obvious with our dog. As a puppy we could walk for an hour, or even more than 5km, and at home he'd still be a rambunctious little pest because he might be physically tired but not mentally. But a 5-10 minute training session, where he has to think? Out like a light on the couch for hours. I imagine it hits dogs harder than us because they're less suited to problem solving and intense thought in general. Now he gets bored if he doesn't get his training but a couple of sessions a day are good for him and easier than a long walk (shorter walks suit him fine now).