No breed is impossible to obedience train, but novice owners might find training some breeds quite difficult. The capacity to learn basic obedience—and even complicated behavior—is inherent in all dogs. Some breeds may require more patience or creativity in training than others. Individual dogs that exhibit fearful or anxious behaviors should also be handled with greater care, and especially not trained using harsh corrective methods, as this training can be psychologically harmful to the dog and result in further behavioral issues.
I've dabbled in agility with a previous dog, but this time I want to go to the show. My 10-month old sheltie is only a spectator now, but the look in her eyes tells me she's ready to become a contender. I've learned from the pros that the road ahead will be filled with training and hard work (for me and for Fiona), but the time spent developing our speed and skills will be rewarded by a canine-human bond rarely obtained in any other activity.
Every dog needs to learn to walk on a leash. Besides the fact that most areas have leash laws, there will be times when keeping your dog on a leash is for his own safety. Learn how to introduce your dog or puppy to the leash, then teach him how to walk properly on the leash, even beside you on a bike. A loose leash walk teaches your dog not to pull or lunge when on the leash, making the experience more enjoyable for both you and your dog.