Dog mat cobs (the type with hooky razor bladed tines) for removing those huge grooming tangles in manes or for thinning/removing burrs.
Original Pine-Sol for rainrot. Dilute it JUST enough to turn it white, put it in a spray bottle and soak the scabs/hair around them only. They will dry and fall off within a week or so...my VET told me this and we have used it for years, no clipping, no baths.
Medicated foot powder for minor wounds & scraps. After cleaning the wound, dust the powder on heavily to absorb liquid and prevent flies/debris from entering the wound while wet.
Mix (only enough for 1 use) equal parts warm water, peroxide and betadine solution (scrub) to use to flush out minor wounds (using a syringe with no needle) or hoof abcesses. DO NOT CAP THE SYRINGE, it will explode...usually in your face
Instead of saline or mineral oil based enemas, which can actually add dangerous levels or rapidly deplete vital liquids/minerals, use a CLEAN emptied child's enema bottle filled with warm water and add a drop or two of
LIQUID Ivory soap as a foal enema.
Groomer's Edge/Double K clippers fit well in the round top metal toolboxes.
Hmmm...I know I'll think of more to add....