Hi, my frogs occasionally are a bit cheeky and mistake my cherry shrimp for food, the cherries are far too quick to be eaten tho, and usually take a couple steps back and carry on with what they were doin. The frogs actually don't seem to mind the shrimp giving them a bit of a clean either. As ammanos are bigger i'd assume there wouldn't be problems with them either. I have a separate tank i use to raise the shrimplets, but that's because of my filter not the frogs.