Golden's love to pick things up with their mouths. Just about EVERYTHING. It is extremely important to teach you golden to leave it. Here is another great video to help you teach your dog to LEAVE IT!
Sometimes a puppy, even those sweet gentle puppies, will show signs of resource guarding. Either for a bone, favorite toy or something of value to them. You will want to work with your puppy daily if he/she shows signs of resource guarding. Here is a great video to help with this.