My mom's pom does this.... and she growls and kinda looks away from you like she's testing us!! omg its so cute but at the same time so darn devious, lol.... all i can say is SPOILED!!!! my mom spoils the heck out of her always has, we all did since she was the only little one in the house until Shelby came along
but yes, i definitely think its got a lot to do with how high and mighty they feel.... i dont think it ever goes away or if u can even teach them to stop.... GOOD LUCK, though!