Dog discipline

So our kids have taken to disciplining our dog.  It's actually really funny.  Sammy points at her and says very sternly,"No! No!"  And Ada calls her, "Stupid dog."  Even if she's just wandering around playing... that one came from... me.  Yeah I know.  I don't usually call the dog stupid.  She was eating the kids sandwiches after I had warned her not too as she was following the kids around.  Yeah... didn't think that one would stick.