As a pet owner, it can be concerning if your dog refuses to eat. Whether it's due to an upset stomach, stress, or a more serious underlying condition, a dog going without food can be a sign of trouble. In this article, we’ll dive into how long a dog can go without eating, the potential causes for a loss of appetite, and what you should do if your dog without eating. First, it’s essential to understand that dogs are creatures of habit, and they typically eat on a regular schedule. Most healthy dogs can go without food for a day or two without any significant consequences. However, this depends on the dog’s age, health, and the underlying reason for their lack of appetite.