Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
shoe (v.)
The verb has two past tense forms, shod and shoed, and three past participle forms, shod, shoed, and, rarely, shodden. There may be a semantic distinction: shoed most frequently has to do with applying shoes to horses’ hooves (or, if you prefer, hoofs): He had shoed the horses recently. Shod is the usually encountered participial adjective, meaning “equipped (with)”: She was shod in glistening boots. We were well-shod for hiking.
