Can you put torn newspaper in rabbit hutches?

Yes of course, newspaper is useful as it can soak up the rabbits wee and provide a bit more warmth. It also is very useful when cleaning out your rabbits hutch as it makes the process quicker as all you have to do is take the newspaper out, replace it with new newspaper then put whatever bedding (e.g sawdust and hay) on top. Some rabbits dont like newspaper in their hutch though, My old rabbit used to shred the paper up and rip it into pieces, so we stopped using that method. But my new rabbit is happy with newspaper on the floor of the hutch. If I was you, I would try it and see your rabbits reaction to it.