What's the problem with wood chips? Not enough surface area to make the carbon available?
Ironically the opposite, wood offers excess carbon in a concentrated area and thus slows down composting...
The readily available carbon to nitrogen needs to be balanced, but a few wood chips are good for is creating air space and voids to prevent compacting...
You want to aim for a 25:1 or 30:1 carbon:nitrogen ratio in your deep litter just like you do for a compost heap...
http://compost.css.cornell.edu/chemistry.html
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