Hi Stu,
Thanks for your question. What an interesting mix your dog is! She must be gorgeous. I am sorry to hear of her recent bout with seizures. It sounds like you have already done a lot of work with her to figure out the Cushing’s syndrome and recent onset of seizures. This is great. Seeking a neurologist consult is always a good idea with a new onset of seizure activity — even if you decide not to proceed with the advanced imaging modalities such as an MRI.
Now, regarding the diet and change in appetite, after a dog has a seizure it is common for them to behave unusually. We call this the “post-ictal” phase. They may seem disoriented and may not keep their normal routine or activities. I would expect them to feel more normal in a day or so. If the abnormalities (and seizures) persist, however, I would be looking further into why. If your dog does not eat anything for more than a day, this would be grounds for a visit to the vet. Determining the underlying cause of the seizure activity will help your veterinarian select the most appropriate course of action. I hope this helps.
Best wishes,
Dr. Kimberly Hester