The denaturant makes the alcohol taste bad. When a denaturant is added to alcohol it is called denatured alcohol or Alcohol Denat. Denatonium Benzoate is a common denaturant. It a quaternary ammonium compound that is considered the bitterest compound known. Quassin, Brucine and Brucine Sulfate are bitter alkaloid compounds obtained from plants.
Well, there can be some irregular pacing, breathing before the seizure. That can last from a few minutes to 30 minutes or more. The seizure itself should not be longer than a few minutes. Anything over 4-5 minutes is a huge risk for brain and body injury. After the actual seizure, a pet can remain disoriented, but they are at least responsive, for another few minutes to hours.
Primary or idiopathic epilepsy is the major cause of recurrent seizures in dogs between 1 and 5 years of age. Since no obvious evidence of brain injury is found in primary epilepsy, the probable cause of seizures may be related to a pre-existing or hereditary chemical or functional defect in the brain.