Do these two feats stack with each other. Eg. 5 from a level 23 barb and 6 more from level 10 DD for a total of 11 reduction?

Hope this has not been asked before and I just missed it in the previous posts. Oh, it has been asked, but that doesn't matter. they still stack.
_________________
I see the fear you have inside, you can run but never hide.
I will hunt you down and tear you limb from limb.

I run the Pre-Epic Builders guild. Join and share your experience.