Probably not. Salt intake and ham/pork CAN cause pancreatitis but you usually don't see seizure activity. If you have seen two seizures, it's now urgent that you see the vet immediately.
Seizure activity can have a lot of causes (epilepsy, tumor, neurological issues, hypoglycemia). Now you need to isolate which it is and treat before he has a seizure that he can't come out of.
Let me know if you still have questions.