I know Cantonment, have driven thru once or twice - and no, i don't mean the stretch of I10 that's one of Cantonment's borders.    You should have Little Eden Farm nearby (Pace) - elderly lady raises bunnies, pigs, various fowl.  Her rabbits are really exceptional, I can definitely recommend (though pricy).  Beyond that, I don't know the area well - I'm a good bit east of you.
I've never shopped these people, but Barnes Feed Store, and Barnes Feed Store Too both carry Tucker Milling.
https://www.facebook.com/Barnesfeedstore/
https://barnesfeedstore.wordpress.com/
Ain't the Internet great?