3 year old, fixed male. Very healthy. Huge appetite. We feed dry food (Purina One) in the morning, and a can of Friskies in the evening. He LOVES it all, and always wants more, but we measure his servings, and his weight is stable at 11#. Very suddenly, he has STOPPED eating his canned food. Barely touches it. He doesn't whine for more food. He just mostly ignores it, and wolfs down his dry food in the morning. Not sure what's going on. How unusual is this behavior? We'll probably switch him to 100% dry food as a result.