Haha, yeah, I learned the hard way only to give a chihuahua one type of kibble at once. If you give them a mix of 2 brands, they'll pick one they like best and then they'll throw kibble all over the place and only eat the ones they want. I had a friend who bought a kibble mix, it was one bag but I guess the kibble was different shapes and flavors within it. His chihuahua would only eat certain pieces, and make a huge mess all over the floor with the rest. But under normal circumstances, where the bowl is full of the same brand of kibble, mine usually only leaves like 2-5 pieces laying around in the living room. I just can't for the life of me figure out what she's singling out the pieces she's not eating based on.