Are you talking about a flea collar, or just any collar?
Ummmm - NO!
Good gods, what a {expletive deleted} reach.
Considering the almost 20 cats, which have graced the lives of my wife, our families and me during the past 50+ years...save for Miss Teia Honey, all have worn a collar. None have had seizures, save Calamity Jane Grey.
Miss Calamity, her seizures were stroke related, and she was over 21 years 3 months of age when they happened.
From this corner of the kitty universe, ank, Wrong Answer!Q!!!