First, let's get this out of the way.
The alpha, dominance, pack leadership theory has been thoroughly disproven and widely discredited, even by the person who developed it. It was based on flawed conclusions drawn from poorly observed evidence. The wolf pack used in the original study was not a real pack, it was a group of individuals thrown together and the situation (captivity rather than wild) skewed the data as their behaviour was not natural. And dogs are not wolves anyway, any more than we are chimpanzees - in both cases there was a shared ancestor but the species evolved in different directions. That's why we have humans AND apes, wolves AND dogs.
This article explains it quite well. Debunking the "Alpha Dog" Theory - Whole Dog Journal
At about 6 months, he is still a baby, so I am guessing he might be trying to engage you in play when he is nipping at your shoes - that's how puppies play with each other. He just needs to learn that's not how to play with humans. I'd suggest you keep a toy in your pocket and every time he tries to do something like this, give him the toy instead. If he refuses to redirect on to the toy, be like a tree - really, really boring until he stops (and he will) then reward with an enthusiastic 'good boy' and the toy. But you have to be consistent, every person every time. I promise you though, this is not aggression - he is like a five year old child. Yes, you might get frustration and an occasional tantrum but it isn't actual aggression. You don't need to worry about having to give him up for that reason.
Telling him ”no” is probably frustrating him too. The problem with ”no” is that it's not specific enough. I'd like you to imagine you are learning to drive.
Every now and then, your instructor sternly says bangoh!. You would be puzzled. Even if you stopped or interrupted what you were doing, you wouldn't know what you were doing wrong - driving too fast, not using your mirrors, turning left instead of right, going the wrong way down a one way street, in the wrong gear, too close to the car in front etc etc.
And "bangoh" is Japanese for no by the way, but essentially English is just as foreign a language to your puppy as Japanese is to you. Can you see how it is exactly like that for your puppy? Frustrating for him as well as for you.
A firm no is at best an interruptor but importantly it doesn't tell your puppy what he has done wrong, and what you want him to do instead.
But I'd also like to know a bit more about the training you have done with him so far - what did you teach him and how did you approach it?
Your dog is not trying to be a pack leader. This is honestly the flat earth theory of dog behaviour, utterly wrong but it won't go away.
The alpha, dominance, pack leadership theory has been thoroughly disproven and widely discredited, even by the person who developed it. It was based on flawed conclusions drawn from poorly observed evidence. The wolf pack used in the original study was not a real pack, it was a group of individuals thrown together and the situation (captivity rather than wild) skewed the data as their behaviour was not natural. And dogs are not wolves anyway, any more than we are chimpanzees - in both cases there was a shared ancestor but the species evolved in different directions. That's why we have humans AND apes, wolves AND dogs.
This article explains it quite well. Debunking the "Alpha Dog" Theory - Whole Dog Journal
At about 6 months, he is still a baby, so I am guessing he might be trying to engage you in play when he is nipping at your shoes - that's how puppies play with each other. He just needs to learn that's not how to play with humans. I'd suggest you keep a toy in your pocket and every time he tries to do something like this, give him the toy instead. If he refuses to redirect on to the toy, be like a tree - really, really boring until he stops (and he will) then reward with an enthusiastic 'good boy' and the toy. But you have to be consistent, every person every time. I promise you though, this is not aggression - he is like a five year old child. Yes, you might get frustration and an occasional tantrum but it isn't actual aggression. You don't need to worry about having to give him up for that reason.
Telling him ”no” is probably frustrating him too. The problem with ”no” is that it's not specific enough. I'd like you to imagine you are learning to drive.
Every now and then, your instructor sternly says bangoh!. You would be puzzled. Even if you stopped or interrupted what you were doing, you wouldn't know what you were doing wrong - driving too fast, not using your mirrors, turning left instead of right, going the wrong way down a one way street, in the wrong gear, too close to the car in front etc etc.
And "bangoh" is Japanese for no by the way, but essentially English is just as foreign a language to your puppy as Japanese is to you. Can you see how it is exactly like that for your puppy? Frustrating for him as well as for you.
A firm no is at best an interruptor but importantly it doesn't tell your puppy what he has done wrong, and what you want him to do instead.
But I'd also like to know a bit more about the training you have done with him so far - what did you teach him and how did you approach it?