The dog is too young to expect this from him. Especially without any serious training beforehand.
The FIRST thing that MUST be accomplished is to establish a reliable recall command from your dog. That means that when you call that dog and say "Murphy Come!" he comes to you EVERY TIME. It may be slowly at first, but it has to be extremely reliable before any off leash distraction work can be trained and you can expect the dog to understand and learn. Murphy is yet too young to be as reliable as he needs to be in order to work mjor, off leash distraction work. You'll need to step back some and take more time and work much more slowly and carefully.
Distraction training is difficult and takes lots and lots of patience and WORK !!! The goal is to have your dog so well trained in recall that no matter what he's doing, even in MID RUN AFTER SOMETHING, the dog will stop on a dime and come to you every time he's called. Sounds impossible, but in fact it can be done and dogs will learn and obey even with major distractions if the proper training and time is spent with the dog working these issues.
So, first, get the dog 100% or as close as you can at recall. Then post again and I'll give you further instructions on "working" distractions and you can beging training the dog WITH distractions, one at a time, slowly and carefully and within a few months, you will begin to be a lot more comfortable and secure knowing that your dog is reliable, even under a major distraction, and will always come to you when called, no matter what. But take it one step at a time and be patient. Rushing a dog before it is ready only serves to confuse the dog and the training then becomes much more difficult.
If the dog is totally reliable at recall, then the distraction work is MUCH easier and MUCH MORE EFFECTIVE and the dog is FAR MORE CONSISTENTLY RELIABLE.
Keep us posted on your progress.
