I'd say yes! Peanut butter is probably one of the most-acid inducing foods because it is primarily fat. It requires more energy to digest (just like any other fatty food), which requires more acid to do the job. Lay off the PB, and switch to a low-fat carb-based diet. Simple sugars are easily digested.
Japanese millet is most successful when planted on prepared soil, although Japanese millet will germinate and grow just about anywhere. For Duck food plots, plant the Japanese millet early in the summer (June-July) depending on the start date of your duck season. Japanese millet seed heads will hold on longer than most millet varieties, even in standing water. The seed will slowly drop out of the seed head feeding the ducks over time.
Chiwapa millet is known for attracting ducks. It is a long season millet, needing 120 growing days, whereas most other millets are only 60 day millets. This allows Chiwapa to be planted earlier in the growing season when rainfall is plentiful and still be standing when the first frost arrives. The large seed head, tolerance of flooding during the growing season, long maturation and preference by waterfowl sets it apart from all other millets. Japanese Seed Head - This 60 day millet produces a smaller, lower yielding seed head than Chiwapa. Fewer Seed = Fewer Ducks.