Pine shavings alone do not make DLM.DLM in the coop. I sprinkle DE very light on the pine shavings.
Personally I'd do DLM out in the run and keep the coop nice and dry with shavings only.
Here's a great description of contents and how to manage organic 'bedding' in a run or coop...and there's a great video of what it looks like.
http://www.backyardchickens.com/t/1037998/muddy-run-help-please#post_16017992
I only use DE in the cracks and crevices of nests and roosts, no place it can become airborne....oh and it does work in feed if you get grain mites in feed.