It's a thing with the cat litter, they have to watch us change it and race to be the first in. We have two boxes though so they eat get to be the first in one.

My boys are used to one particular kind and I had Patrick pick some food up and he bought the wrong kind. Well, they just stand there and look at it. They eventually eat it, but we won't be buying that again. I even bought some treats and scattered it through so that they would eat in search of treats. It only works so/so. Good luck!