I was thinking more of getting a high dose of the l. rhamnosus while still obtaining other strains through Greek yogurt/kefir or in addition to a multistrain probiotic supplement. Today I saw a TV commercial for Digestive Advantage. It stated that most probiotic supplements don't sruvive through your stomach acid, but this one does.
I would try this particular cheese. I think you can only find it at an Italian grocery store.