Loss of appetite in dogs can happen due to many reasons, including stress, changes in diet, infections, dental problems, or underlying medical conditions. Sometimes a dog may eat less because of heat, tiredness, or emotional changes. However, a sudden or long-lasting loss of appetite should not be ignored.

Common signs include refusing food, eating very little, weight loss, weakness, or vomiting. If a dog stops eating for more than a day, it is important to consult a veterinarian to find the cause. Proper diagnosis helps identify issues like stomach infections, parasites, organ problems, or pain while chewing. Providing clean water, a calm environment, and a balanced diet can help support recovery.