It may be that the dog has recently changed to a new brand of dog food, and the dog does not like it so he does not eat it. The owner can change the dog food for the dog; or the dog food has deteriorated, tasted, become damp, or difficult to eat. If it is difficult to swallow, you need to change the dog food; it may also be caused by the dog being picky about eating, like meat food, canned snacks, etc. If the dog doesn’t like to eat dog food, the breeder can mix the dog’s favorite food into the dog food so that they can be eaten together.