I sold Dannon Frozen Yogurt in the late 1970’s in Akron, Ohio. It was definitely the BEST frozen yogurt I have ever, ever eaten. It tasted like yogurt, not custard. Not too sweet, but with a bit of "something" in it that really hit the spot.
After that, I sold Columbo yogurt, which was very good, but it did not have that wonderful "tang" of the Dannon. How I wish they’d bring that back!