Show Stopper is a suppliment that you add to the food daily. It is the consistency of brown sugar and my dogs just go crazy over it.
I get it from
K9 Show Stopper - Omega Dog - Animal Naturals
I have a Doberman (and a Doberman meetup group with a lot of members) so I am able to order it in bluk for a tremendous discount. Your best option is to get it from a vendor at a dog show if there are any near by because the shipping is a bit steep. A 4lb container will probably last you 6mos if not longer.
Good luck and let me know how it goes!