We had a tabby like that once - his name believe it or not was Slug! He'd bring rabbits into the kitchen through his cat flap during the night & eat the lot except for one front leg and about 4 inches of large intestine - weird!
I got home from work once to find him curled up on the sofa with a proud look on his face. Proud because, laid out in the middle of the rug was a massive but very dead weasel.