There are several degrees of possessiveness and guarding. On one hand, it can be rather mild and involve avoiding returning the object and moving it away from the owner, in which case if the owner is persistent enough, the dog will give up the object eventually. On the other hand, the problem can be rather extreme in which every approach towards the dog while he has a valuable possession results in growling, snarling, and biting (some dogs will guard an object even if they are next to it). Between those two extremes there are many other moderate manifestations of the problem. Similarly to separation anxiety, resource guarding is a problem that can be difficult (and dangerous) to solve when it is already a well established behavior, and just like separation anxiety, preventing the problem can be an easy process. It is not in the scope of this book to explain the methods of solving a resource guarding problem that is already established. If resource guarding is already a problem, you should consult a behavior expert. Keep in mind that living with a resource guarder can be rather dangerous, especially when kids are involved.