Well, I have read comments from people saying genetics plays a big part and I agree with it only 50% (ofcourse I don't expect a Chihuahua to bite in full mouth grip on a training sleve, that genetic part I can agree with)... all I wanted to say is that drive work can be developed thru proper training, dedication, and love for the dog despite that the dog is not from 100% pure working blood line.
So again I would like to stress that confidence and courage can be developed but slowly.
The important canine drives and working traits required in a working or sport dog are genetic. If the drives are not present, they cannot be developed. How can you improve upon something that's not there in the first place?
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Beauty without vanity, strength without insolence, courage without ferocity, and all the virtues of man without his vices.