I quick warm up scribble. I apologise for the title, but it was the first thing that came into my head. If you think it's a little too gruesome, then maybe the "cat" was porcelain and maybe the wee scamp knocked it off the mantle piece by throwing a ball inside ( and we all know how dangerous that can be, right kids?).
So there, a perfectly reasonable explanation. The blood? erm.....I'll get back to you on that one.