the world > food and drink > farming > animal husbandry > keeping or management of horses > [noun] > keeper or manager > official of household (6)
A chief officer of the stable, who had charge of the provender for the horses.
With noun prefixed as sergeant-ferrer, valet-ferrer, yeoman-ferrer: An official who had care of the horses in a large household.
Perhaps: an officer of the royal stables.
With noun prefixed, as sergeant-farrier, yeoman-farrier = ferrer, n.2 3. Obsolete.