Until a few days ago I had three of them. I've already told about how I got my yearling started. It only ate red-bellied snakes until brumation, then after brumation it started taking scented pinks. The two I had recently were subadults and they wouldn't eat a thing until both had shed, then they started on brained, thawed pinks. A friend of mine also has a w/c subadult that ate a fuzzy the night he took it home. Some you have to be real patient with.
Easterns in Michigan eat small snakes and lizards and small rodents. They probably eat other items occasionally. I even found one deep in a forest by a small stream that would only eat minnows. I've seen adults that were still feeding on snakes, especially smooth green snakes, that were difficult to switch over to mice.
Good luck with them. Easterns aren't always easy.
TC