I don't have experience with Foxi, though I am trying to find a pair for a breeding project. But I have kept southern Black racers, and those I just leave together all the time. I make sure they are all well fed, and I feed separately. Don't know if Foxi have more tendencies to eat each other or not. I wouldn't think so, unless one was a great deal smaller than it's mate. Cool them in winter feed them hard in spring and have the nest box ready. Good luck!
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King Snakes! Who can make a better mouse trap?
Jorge Sierra
My Site > www.Sierrasnakes.com

