Pits weird eating habits?

I have a boxer pibble mix and for some reason any and every time he eats he was to push a certain amount of kernels out of his bowl. He used to always flip a big bowl over and eat it all off the ground, I changed his bowl since then cause he'd lose kernels and it attracted bugs. Now he has one of those food/water bowls and i fill both sides with food and before he eats he pushes between 7-10 kernels out every meal. Is this like doggie OCD or something?