Dang it! I hate when they go back and erase everything they say before I get to read it. Guess he doesn't REALLY stand behind his theory 100%, eh?

pwcorgilover,
I was told that by the people we got him from, that they are very content with their family and offten could care less about other people, that they are very protective and vocal and they bite alot out of nature because when they work, thats what they do is nip.
I just find that I am getting hounded by people that are saying my dog isnt friendly that he seems aggresive and right now I dont really know the difference. I dont see him as aggresive, but that is a common mistake that is made. With my family he is wonderful, i trust him 100% and now he is tolerating other people wich is what i wanted. I want to be able to take him out with out fear of him hurting anyone. He has never bit anyone out of fear or anything, doesnt even seem like he wants to.. he is just loud and vocal he does this growl bark thing.. its hard to explain the sound.. Its like a warning, back off.. But if they dont he has never once hurt anyone, I just want to make sure he is trained enough not to!
As for weather he is friendly with other people, I dont mind if he doesnt want to interact with them as long as he doesnt act out at them because he isnt comfortable.
So much stuff.. it makes my headache!
By the way what would everyone define as aggression for a pup?

IMO most pups are aggressive. It seems to be part of being a puppy. Socialization with others (both human and canine)is intended to make the pup comfortable around others. He will learn what his place is in your pack. He will learn what his limits are with his human pack. As for the breed, can't help you there, but you're doing the right thing by talking with the people you got him from. They can tell you about the parents personalities and how your pup may behave.

I would call blue heelers "determined" I used to go a lot of horse shows and a lot of rodeos. You would not dare reach in the back of a truck that had one because he would eye ball you the whole time, hoped I never unknowingly parked next to one. I even seen one nearly scale the arena fence to try and get to a horse. One I also seen grabbed a hold of a boys pant leg and held on and the boy just had to drag him everywhere he went with this dog attached to his pant leg. I would certainly talk to that dog trainer lady so you can get some good obedience into him to keep things like that from happening. I like heelers and admire their concentration and stock dog ability but they arent the dog for me. With training the aggresivness would probably disapate if you keep up what you have been doing. But I am not an expert, just some thoughts and experiences. (I have also seen many well behaved heelers)

Aggression is really a symptom of something like being fearful. They display it to say get the person or animal to go away, so the first time they lunge, the person may back off a bit and this proves to the dog that the lungeing works so sometimes the lungeing escalates.
A pushy puppy isn't technically aggressive, just pushy, I know lots of people like that, but they aren't mean.