My guess is the Fentanyl patch is making him groggy. They often do not eat for a couple of days after surgery anyway; but, I have seen many pups react that way to the Fentanyl patch...they are so out of it, that they will not eat.
You might want to call your vet and explain how he is. Sometimes it is better to take the patch off and use another medication for the pain, but don't do that without consulting with your vet. |