I trained the crap out of my dog and everyone is always so impressed with how well behaved he his. It was 100% all of this.
That said, I failed somewhere on the leash training. He's pretty awful on walks until he tires out a bit
Confidence, and a short leash. Your almost holding them by the collar and right at your side, till they get the hang of it. Also a clicker is a great tool or click with your mouth. It doesnt need to be loud as they hear so well. I use a quick ehh with couple tongue click or a quick chhshh to get their attention. When yhey start to move away, a light tug, or stop and click, when yhey look at you get um to sit, then start agian. See if that helps.
The most important thing is consistancy. You can train a dog as well as a pro, but service dogs, the good ones are so good because they also weedout the ones that arent. Most in training are trained as pups with foster homes, The ones that take well to the training move onto the next phase the ones that dont just become normal pets. They are often breed from prior service dogs so the genes are there. I dont know the numbers but lots dont make it. So really its not fair to compare them when your taking the best of 20
I had a dog once that i spent about a year with from a pup. I was hurt and basically spent every day with her for about a year. She wouldnt even blink/budge if i dropped food on the floor. She got fed from her bowl, though i would give her a bone on occasion but she liked her pull toys more. She was a rotti, so she loved tug.
She never begged or blinked when you ate. Then i got better and and was gone most of the time and then my dad was with her more and bbasicallyall that trIning went down the drain as he would give her what he was eating. Even then aroud me she never begged. Still she was one of the best dogs i ever had. I didnt leash train her she was just in a fenced in yard, but my neighbor took her hiking off leash all the time. She did have a prey drive that never went away, she'd take off. but she stop if you called her so that was nice.
She caught a pheasant once and brought it yo me as a gift, not sure she knew what to do with it. But the best was watching her and my cat hunt chipmunks together they 'd spend hours doing it., though i dont think they ever got one. That cat was not a good hunter, but it was funny watching him try. A rotti and a cat as best friends is a funny site to see. The chipmunks would hide in this 8 foot long pipe that was too small for either of them. The dog on one end and the cat on the other for hours. The chipper just waited them out, but it was a common occurrence.
Some dogs will always have their quirks,