What is the blood from in my cage?

This sounds like a riddle or a line from a story! To figure out the answer, I need more information.

Could you please tell me:

* What is the context of the question? Is this part of a story, a game, or just a random thought?

* What else is in the cage? Is there an animal, a person, or something else?

* What kind of blood is it? Is it human, animal, or something else entirely?

Once I know more about the situation, I can help you figure out where the blood came from!