If a dog is seriously picky about food, the owner needs to promptly train the dog to correct it. You can mix a little dog food into the food it likes to eat and let the dog eat it together. Then slowly increase the amount of dog food and reduce the amount of other food. Wait until the dog Once you get used to it, you can switch everything to dog food. If your dog is still picky and refuses to eat, you can use the fasting method to correct your dog’s picky eating habits.