My motto is "No Dog Untrainable".
Experience
The methods which I use have the same basic foundation as most other trainer's, but I have adapted them to be better able to train dogs that are older than a couple of years old and have either never been trained much, or have been allowed to slide, which causes a dog to become stubborn, inattentive, unruly, "unmanageable" and so called untrainable. The methods I use are styled to be military rigid and work on puppies and younger dogs also, the format being adjusted accordingly: https://youtu.be/ykMETZwIzVA?si=AUn61hx-98Jm0kpd.