Not sure the rain suit is necessary, it's not hydrochloric acid. 

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Cool pics! they are mites.@Tesumph
Success with better pictures, taken with Nikon D810 with a 105mm Macro lens processed through Photoshop for enhancement, clarity and sharpening.
They have eight legs so are mites and we have determined that they have lived off the chicken for a bit more than a week. The pictures (white background) also show, we believe, some without blood and some with also after off the chicken for a bit more than a month. It is apparent from leg movement (see shots with black background) that they are still alive after more than a week. the white background shot with the circle clearly shows eight legs.
I will check again tonight with paper towel under the roosts for signs of blood. Will also try to feel for lumps on the chickens.
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