Help is needed leash training my three year old boston terrier. Indoors, she acts wonderfully, responding to commands and behaving properly. Outdoors, she is a different dog. She was rescued, so we're unsure of her background. She pulls constantly, so hard that she has a hard time breathing. For the last year we've had her we've attempted to correct this behavior but to no avail. Please contact me via email if you have experience leash training dogs and would be willing to come to our home and help us. Referrences preferred. We live in Park Ridge, just outside of Chicago. Nights and weekends only.