I bought the cat from breeders, and when I picked her up, after watching the 'exhibition' of her parents' awards from different cat 'beauty pageants', they handed me a 10 pages long handbook about what exactly I should feed the cat with, that she only eats Royal Canin etc. On our way home, I made a deal with the cat: I won't call her von Orchidenwald Baby Mercedes, like her mom, or similar posh cat names, and in exchange, she does not torture me with being snob and picky. She agreed, and she wants to eat everything. And her name is Pocak (means tummy in Hungarian).
(Begging this way has been her skill since she was a kitty, I did not trained her. I cannot train her to do anything, anyway.)