Oh gosh. White pine shavings plus chicken manure equals awesome awesome compost! I guess you probably already know that. So, yeah, you can use the fresh out of the bag stuff for mulch, etc., and the chicken litter as a fine soil amendment and compost activator.
I once got some rabbit manure mixed with white pine shavings -- an enterprising family sold big bags of the "clean up" from their rabbits. It was lovely wonderful stuff!