for you that have horses,what is PDZ? is it the same as DE?
I don't have horses, but I'll answer anyways.

PDZ, or Sweet PDZ, is a stall refresher. It is safe to use with chickens. It helps remove moisture & odors, and a good option for the "poop deck" under the roost, in the coop. It helps control the "yuck" & is scoop-able like a cat litter and that is handy for daily maintenance. Just hang a kitty pooper scooper in the coop, and do a quick sift while collecting eggs. It comes in a granular or powder form. https://www.backyardchickens.com/t/707861/sweet-pdz
DE, or Diatomaceous Earth, is pretty much a powder made from ground fossil/bone/remains of aquatic organisms. If it's the FOOD Grade DE, it is safe to use with chickens, and around other farm animals even people. It works like a pesticide... or rather a pest preventative by helping to control hard shelled pests... ie: ticks, lice, mites, ants, beetles, fleas, etc. And also helps prevent fly larvae & such from developing in manure, etc. Sprinkle it around the ground around the chicken run, in the coop, mix it in the dirt where the chickens dust bathe, or even sprinkle a bit in their feed to help control internal worms/parasites. DE should only be considered a "preventative assistant". It really isn't as effective if you already have a pest outbreak... mites, lice, worms, etc, in your flock. Be careful not to breathe it in... it's a very fine powder, & while essentially safe to consume, it's not good for your lungs.