My little Alfie has seizures and we started on medication once they were more frequent.
We were seen by the top vet school here and the diagnosed epilepsy.
He is on phenobarbitone and has regular blood checks.
Taking the video and keeping a diary are great ideas.
At first my own vet was reluctant to treat him for the seizures but once I noted down exch seizure date time if anything seemed to trigger it , that seemed to do the trick to make him take it seriously.
Good luck with your little one.
__________________  From Julie  Alfie  & Lottie |