The "[hoof hold":](/tags/hoof+hold) and "[dexterous hooves":](/tags/dexterous+hooves) tags seem to both mean the same thing in practice: "hooves holding objects as if hands were holding them".
The "[hoofsies":](/tags/hoofsies) tag is simultaneously used for the hoof-stamps from Coloratura, the word "hoofsies", the hoof version of footsies or just hooves being present on the image. At least the latter doesn't belong here.
Many of the "[marking tags":](/tags?tq=*marking*) are duplicated, mostly because of "marking" vs "markings" versions. For example "[facial markings":](/tags/facial+markings) / "[face markings":](/tags/face+markings) / "[facial marking":](/tags/facial+marking) / "[face marking":](/tags/face+marking)
EDIT: I'm surprised to find only two tags for items attached to hooves: [hoof attachment](/tags/hoof+attachment) and [hoof strap](/tags/hoof+strap) . Are there more common tags for this that I didn't think of?