How to Train a Guard Dog - 6 Easy Steps (with Pictures)
How to train a dog to guard your house
Dog Training Tips : How to Train your Dog for Personal Protection
Great dog training tips from PetSafe -- training with treats, praise; teaching "Take It" and "Leave It"
Begin guard dog training early in a German Shepherd's life.
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dog agility equipment | Agility Equipment by Brad A. Thomas
excellent advice about options for treating food guarding
German Shepherds will usually take to being a guard dog naturally. It's important to train them to be obedient. Learn how here.