I had a case years ago where I homed two rather distinctive kittens together - one had been shown. So I knew immediately when I saw them advertised in the local petshop some months later, the advertisement mentioning rosettes, that they were the ones I sold. I swallowed my annoyance, bought them back and rehomed them again. I always make it clear that I will take a kitten back but I guess the buyers thought they would get more money back by advertising them

Liz