I have heard conflicting stories about if a shifter's damage reduction stacks or doesn't stack with a dwarven defender, so I was just wondering if anyone could clear it up?

Thanks Shifted forms damage reduction and damage inmunity (I have only tested with risen lord) stacks with Dwarven devender damage reduction which also stacks with the one from items.
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This is my sword.
There are many like it, but this one is MINE.
My sword is my best friend. It is my life.
I must master it as I must master my life.
My sword without me is useless. Without my sword, I am useless.
I must swing my sword true.
[...] OK, thanks a bunch