Spaying or neutering a dog reduces their metabolic rate, leading to a lower daily caloric requirement. After the procedure, dogs often experience a decrease in hormone levels, which can reduce their overall energy expenditure. As a result, maintaining the same feeding routine without adjusting portion sizes can easily lead to weight gain. To prevent obesity, it's crucial to monitor a dog's diet post-surgery and adjust their caloric intake accordingly. Consulting with a veterinarian for tailored feeding guidelines is recommended to ensure the dog remains healthy and at an ideal weight.