An Animal, Perhaps?

There is an animal behind the wall of my fireplace. 

I don't know what to do about it. 

It's been there since yesterday. I'm guessing it is too dark for it to find it's way out. 

It sounds like it is fighting to get up b/c I hear a fight of scatches and tumbles and banging. 

I don't want the damn thing to die in there. 

I feel bad for it. 

Any ideas?