To correct resource guarding behaviour you first need to understand why your dog is exhibiting this behaviour. More often than not, resource guarding is due to anxiety, insecurity and fear rather than aggression. Assess your dog’s needs and choose an approach to restore their confidence and sense of security to eliminate resource guarding behaviours.
Dogs need both positive and negative reinforcement for effective training. This is why so called “positive only training” doesn’t work. Find out how training tools like e-collars help to teach dogs boundaries and self-control as part of their training.