If I go to a barbershop, and the owner gives me a haircut (which is usually the case where I get my hair cut), do I give him a tip? Yep, sure do.
I tip for the service, not depending upon the person giving it, as long as the service is satisfactory. Tip is the same if it's the owner, or his employee, at least that's the way I see it.

bj-21.