On World Pet Day, pet owners are reminded that a dog's diet is critical to their overall health, extending beyond mere appetite. Dr. Akanksha Diwakar, a veterinary doctor, highlights six red flags that indicate a dog's diet may not be effective. A dull coat often signifies a lack of essential nutrients, while digestive issues such as loose stools can indicate that the current food is poorly balanced. Additionally, a sudden drop in energy levels may reflect nutritional deficiencies rather than just aging. Unexpected weight changes—either gain or loss—can also point to an unbalanced diet. Frequent infections and new itching or food sensitivities may suggest the immune system is compromised due to inadequate nutrition. Recognizing these signs early can help ensure that dogs receive the balanced nutrition they need for long-term health.