Possessive behaviour happens when your dog lays claim to a particular resource, like a toy or bed, and seeks to protect it. Some possessive behaviour may not seem like a big deal, for example, your dog ignoring you when you ask her to drop a tennis ball is a minor form of possessiveness, but it probably doesn’t alarm you much. However, these small signs of resource guarding can grow into bigger issues. If your dog growls or snaps at you when you try to take back a toy, you have a problem. The first step to managing a possessive dog is to recognise the warning signs of possessive behaviour: Refusing to give up a toy or treat when asked, Snapping at other dogs while eating, Hoarding toys or treats, Growling at other animals while holding a toy, Jealous dog behaviour such as head-butting another dog who’s being stroked. The longer you let your possessive dog get away with resource guarding, the more it will be reinforced. Dogs who get anxious, growl, or even snap at other animals are showing possessive aggression, and it’s important to intervene.