I have a 4 year old male cat named Alonzo. He' really cuddly and lovable, but when he gets bored he usually causes trouble. About 4 am every morning when everyone is sleeping including my other 3 cats he starts meowing a very sad meow. It goes on for quite some time. He wonders around the house meowing! Sometimes he picks a fight with one of my female cats to get her screaming. I know he's probably just feeling lonely and is looking for attention. "But at 4am?" LOL!