I can't quote on this device, but I have not found the expensive necessarily equals good quality rule to be true for most any aspect of life, including animals. I find the most important thing is being aware of the traits you want, and dealing with honest people, wether for five dollars or 5,000.
I would try NILF work or work with a trainer/another program for a week. If no improvement is seen, I'd be using that trial period for what it is meant for and returning the dog. Or, with a kid involved who may get more and more attached, I may just bring back now. That is not behavior I...
Just because this breed fits into your criteria (or at least, certain mixes are common in some areas that will have short hair), and because they are an easy breed to fall in love with, I just want to issue a lesser known warning about Australian shepherds. They are a geat breed. They can be...