Then there was the circus of giving her some worm medication. That cat would eat meat with a little worm tablet hidden in it.
She would finish the meat and miraculously she would spit the pill out.
I had similar difficulty. Thought I'd be smart and mix the medication with his food. Result is he wouldn't eat any the food on that plate.
Todate I have been unable to administer any medication of any kind.
Rubbing flea powder into his fur is as far as I can get, and not without the complaining.