They're always hungry. Once my cats near adulthood I don't keep them very well fed, and so they hunt. They know the schedules though, they come at 7 AM and PM to get some fresh milk, Around dinner for left-overs, and around other people's dinner times for left-overs too
I don't really remember if it was very bad, but he says it wasn't THAT bad. What's bad was when my uncle sliced his hand with a blade to suck out the poisoned blood. *Shudders*