It may be several months before that bond has become strong enough and your voice will be what he hears when he is excited. Sometimes the excitement of a passing car, child, bicycle rider, squirrel, cat or another dog is enough to cause them to chase and put themselves in harms way. Because of this many Aussies die each year under the wheels of cars. Protect your Aussie. Keep him safely on leash when near traffic and never let him off leash to potty or play in an unsecured area.
Temptation can simply be too great for our wonderful working dogs.
There are many dangers our dogs are subject to. Please review this list as a reminder of how you can reduce the risks to your dog.