You forgot crows, ravens, seagulls, 'possums, fox, bobcat, and the ever present feral dogs. After a good PD shoot there is a veritable smorgasbord buffet spread out for the hungry critters. Usually, there is no trace to be found after 48 hours. (Except for a certain jackrabbit shoot I can remember, lol.)

Almost forgot. In certain parts of WY that has high alkalinity, the Pdogs have a fondness for dining on their recently exploded comrades. In those areas, we consider dead PD's as "chum".