This is regarding the older cat. He's a Maine Coon, just about 15 months old. As of lately, he's really moody. He'll claw at us and try to bite us when we try to pet him, totally at random. He's been hissing at my wife a lot and just trying to keep to himself. What would cause this? He's eating like normal, still playing, etc. but I have no idea why he's acting like this. He's neutered and an indoor cat. He gets along just fine with the other cat we have.