Leash training

Question
Hello i recently adopted a 4 yr old, 120 lb, male german shepherd. He has been through several owners and has little training. Taking him for a walk is a nightmare because he pulls so hard. I am becoming very frustrated because i dont know how to break him of this. Any advice would be appreciated. Thank you.

Answer
First of all you do not "break" a dog. You train them. Him being 4 years old and never having had you or anyone else as a "pack leader" may mean that the dog cannot be trained to walk on a leash. What type of collar are you using or are you using a harness?