By Raking It Out I Am Thinking Its A Sand Bottom Ground Pen? If So Do Not Use De It Will Turn To Mud And In Turn Make The Entire Pen A Mud Bog. If You Can Move The Birds To Temporary Housing On A Good Warm Sunny Day And Make Up A Bunch Of Bleach Water Solution... Saturate The Sand Floor With It And Allow To Air Dry (this Will Require Some Intermittent Raking To Move Wet Sand From Bottom To Top So It Can Dry And So On...) This Will Sanitize The Sand Substrate And Kill Off Most Pathogens And Odor Causing Bacteria, Can Be Repeated As Needed
