If you don't feed your pet dog for a long time, the following observations may occur: 1. **Early stage of starvation** - **Behavioral changes**: The dog may become particularly clingy, frequently following the owner, looking at the owner with pitiful eyes, trying to attract the owner's attention to feeding. - **Abnormal activity**: It may be more active than usual, constantly wandering around the food bowl, sniffing, and may even try to rummage through the trash can to find anything to eat. 2. **Mid-stage of starvation** - **Physical changes**: The dog's weight begins to drop, the ribs may gradually become obvious, and the body becomes thin. - **Mental depression**: Show obvious fatigue and weakness, greatly reduce the amount of activity, not willing to move around, and often curl up in a corner. - **Digestive problems**: Symptoms of digestive disorders such as vomiting and diarrhea may occur, because the stomach and intestines begin to have a stress response without a normal supply of food. - **Abnormal eating**: If you provide food to the dog at this time, it may wolf it down, not knowing how to chew slowly, and may even choke because of being too eager. 3. **Late stage of starvation** - **Impaired organ function**: Prolonged starvation may damage the function of important organs such as the liver and kidneys, affecting the dog's health. - **Metabolic disorders**: The dog may experience metabolic disorders, such as low blood sugar, which may cause the dog to tremble, become weak, convulse, or even fall into a coma. - **Decreased immunity**: The weakened immune system makes the dog more susceptible to disease. Some diseases that were not serious at first may become more serious or even life-threatening.