Mice, rats, asf (African soft furred) rats. To me, mice would be least desirable since when the snake gets big he will need to eat multiples. Same with asf's. People say that they will imprint on a prey item. I have fed asf's and rats. Some of them would go back and forth no problem, some of them would turn their nose to the asf's. Imo, since balls can be picky eaters anyhow, I would find the prey item he will eat, and stick with it.

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