How can possessive aggression be prevented?
Teaching puppies when they are young that handling their food and possessions results in good outcomes can help deter possessive behavior. If a puppy is eating, calmly approaching and talking softly while perhaps petting and dropping delectable food treats into the bowl may help some puppies learn that your approach is non-threatening. Once they are comfortable with this type of approach, you can gently restrain the puppy and remove the bowl, then praise the puppy and promptly return the bowl. You can follow a similar pattern while a puppy is playing with its toys. Approaching calmly, offering a food reward and taking the possession, praising the puppy and returning the object teaches the puppy that your actions are not to be feared. Using a leash can help insure success at the outset with a minimum of confrontation.