Unfortunately, it is true that at some point the cause of a dog does not eat after dental treatment may be due to a severe case of pancreatitis when anesthesia and trauma of dental work that pushes along their course load. This is why pre-op blood work is important.
Some veterinarians are using vaccines that are supposed to produce enzymes to help keep tartar at bay. This is a great concept. However, I've had friends tell me that their dogs were lethargic and sick for several days after being shot. I wanted to be aware of this possibility as I did not know, myself!
If it's been a few days since the dentist appointment and his dog did not dare, double check the food you are eating. Some dog foods are dangerous and lethargy are common symptoms. This could be the cause of your dog does not feel like it.
