Great thanks for this...everyone's opinions have been very helpful...I appreciate everyone's experience and knowledge...
I have sand in my coops and runs, shavings in my nesting boxes and silkie 'beds' boxes...I clean everything out every Saturday....rake/sift sand, change out all shavings for new and then I sprinkle everything with DE...
Now I get down and pretty close to everything when cleaning...especially the sand as I use a cat scooper and I think I would have noticed any creepy crawlies and I never have until last week when I noticed red specks in the sand moving in the little silkie coop...that was last weekend when I blasted the coop with sevin and applied ivermectin to all my birds and everyone is still alive!
So today everyone is being thrown out since the sun is out and I am off to get permethrin spray for the coop...