Gracie does exactly that! When I got her, the breeder said to feed her a certain kind of kibble, which she had been getting already, but to add in this other organic stuff to move her to that. From the first day I did that, she picked out all the organic bits and left them around her bowl. I tried it a couple more time, actually counting the organic bits to see if she picked them all out, and she did! So now I'm moving her to Wellness puppy kibble because I think it's better than what I was giving her and she eats her old kibble and the Wellness mixed together without discrimination. Too funny
