However, that's exactly what happened to one family in Dublin.
As you can see from the picture, the cat made a right go at eating an entire Christmas chicken.
According to Kirstie McDermott, who shared the photograph of the carnage to her Twitter, it had a go at some frozen beef that was defrosting, too, but was scuppered by the thick plastic wrapping that protected it.
McDermott said that the cat is a regular visitor to her parents' house, and must have broken in during the night as everyone slept peacefully upstairs.
The pictures show that the cat obviously gnawed and bit through the skin of the chicken and then had a feast on the meat underneath.
In her Twitter post, she wrote: "So next door's cat broke through my parents' cat flap during the night AND DID THIS"
It's not exactly a master of stealth and disguise, either. Apparently the cat simply waltzes in through the cat flap that the family have for their two cats to come in.
The difference is that their cats aren't really interested in human food, whereas this rogue very much is.
Kirstie continued: "My parents have two human-food averse cats who clearly did f*** all while this was going on LOL".
Well, what were they supposed to do, really?
Then, after the act, Kirstie shared a picture of the likely culprit sitting on a nearby roof. Look at the sheer evil, cunning, and satisfaction in those eyes.
There is a cat that knows it has won, and there's nothing anyone can do about it.
It could have been provoked into this heinous act by the fact that its owners are currently away on holiday.
Luckily, the family - as cat lovers themselves - weren't too fussed about the whole incident. They also had the aforementioned beef, as well as a ham, to enjoy with their festive lunch.
As for those who were being mean about the cat, Kirstie wrote: "As a cat-loving family we found it highly funny and it's no big deal - we'll cut the nibbled bit off and it will be fine."