The bulk update request #657 is active.
create implication countershade_scales (2137) -> countershading (160062)
create implication countershade_feathers (130) -> countershading (160062)
create implication countershade_fur (15475) -> countershading (160062)
create implication countershade_skin (302) -> countershading (160062)
create implication countershade_ears (650) -> countershading (160062)
create implication countershade_neck (6643) -> countershading (160062)
create implication countershade_genitalia (1560) -> countershading (160062)
create implication countershade_penis (455) -> countershade_genitalia (1560)
create implication countershade_balls (1067) -> countershade_genitalia (1560)
create implication countershade_pussy (286) -> countershade_genitalia (1560)
create implication countershade_anus (79) -> countershading (160062)
create implication countershade_butt (3453) -> countershading (160062)
Reason: These are all of the tags in the countershading wiki that don't already imply countershading. Maybe they forgot?
Plus some other obvious ones (penis and pussy imply genitalia)
EDIT: The bulk update request #657 (forum #304288) has failed: Error: countershade_penis already implies countershading through another implication (create implication countershade_penis -> countershading)
EDIT: The bulk update request #657 (forum #304288) has been approved by @Millcore.
Updated