How do you train a dog to be less possessive over food?

This takes a lot of training and a lot of discipline. When dogs are puppies it is a good idea to take away their food while they are eating and then give it back. Also, feeding a dog by hand sometimes will lessen the amount of food aggression they have. For toys, train your dog to give up their toy to you when on command, like drop it. This is make it so you can easily get the toy from the dog, during early training it is good to give the toy back, so when they drop it they do not associate it with a bad thing.