I had three cats when I was younger, and one of them was one who just turned up one day and decided to move in. He had many funny traits, but the best one was if you put down food he didn't like, he wouldn't just not eat it, he would mime that he was burying it, (like they do their poo), as if he was saying "this is crap" to you. He would look at you as he did this, and then walk off. I don't know if this is what he meant, but I thought it was hilarious.