I have heard it all, Rat, hamster, guniea pig, and the best was a mouse on steroids.... I was like Did you think of that all by yourself or did your 5 year old granddaughter help you????? Actually I felt bad because I seriously think a 5 year old could think of something better to say that that!!! Rude people. Why does everyone have to try to be funny instead of thinking about how that insult may hurt us yorkie owner feelings.? If you have nothing nice to say ....then dont say anything at all!