This is not how the blessing is worded in the trebnik. The prayers say "O Lord, bless this (thing) ..." or "This (thing) is blessed by the sprinkling of holy water..." They do not say "bless your servant N as he uses this (thing)" or "bless the use of this (thing) by your servant N" The prayers and blessings are quite specific that the thing itself (whether it be animal, house, barn, car, whatever) is blessed. Fr David Moser