He had one seizure about a week ago, and was trembling two nights ago, and has lost most all of his appetite.
I'm sorry to hear about your dog's condition. Seizures, trembling, loss of appetite, and vomiting can indeed be quite concerning. These symptoms might be related to various issues, such as neurological disorders, reactions to medications, or even stress from recent lifestyle changes.
Given the severity and combination of these symptoms, it's really important to have your dog evaluated by a veterinarian as soon as possible. They will be able to perform the necessary tests to determine the underlying cause and provide the appropriate treatment.
In the meantime, make sure your dog stays hydrated. You might also try offering small, bland meals like boiled chicken and rice to see if his appetite improves. Keeping him comfortable and minimizing stress by maintaining a calm environment can also be helpful.
Please seek veterinary care promptly to address these symptoms. If you have any further questions, feel free to ask. Thank you.