My cat Sunny is about 4 months old. He's been eating Royal Canin Kitten food and loved it, but all of a sudden he seems bored of it. He's not eating as much and sometimes just stares at it when I put it in the bowl. Should I be worried? He still eats wet food like crazy and tries to eat food off the floor like he's hungry. I've food him only wet food today because he is only eating a little bit of dry then stopping. What should I do?