Must be free of any type of resource guarding behavior with other dogs or humans. (possibilitydogs.org)
This type of guarding behavior is applicable to all situations, whether it is over territory, toys, food, etc.. (buckeyedogtraining.com)
For example, many dogs that show food guarding behaviors while surrounded by kennels full of stressed out dogs may show no such behavior when they feel safe in their own home. (wileypup.com)