I swear, it's a good thing she's cute!
When Nibblet starts barking too much, and I tell her, "Nibblet, BE QUIET!" She'll bark back at me sometimes like she's saying, "YOU be quiet!" And sometimes she'll sass me when she doesn't want to sit. She'll do it... But not without attitude.
I'll tell her to "sit pretty!", and she'll give a little growl like she's saying, "stupid Poopyhead!" under her breath.
On the whole, she's a good girl and I love her to bits, but SASSY?!?!?