It is normal for a dog to not eat or drink on the first day after sterilization. Because the dog is relatively weak at this time and has no appetite, so he will not eat or drink. However, the dog needs to supplement nutrition, so the owner needs to help feed it. You can prepare porridge, add some minced chicken, carrots, egg yolks and other foods to the porridge, and then use a syringe to extract and inject it into the dog's mouth. Do it slowly and not inject it all at once. Too much can easily choke your dog.