Welcome to PBF!
I agree with Snrub on the initial stocking numbers on Fathead Minnows (FHM). Keep in mind though, in most cases, the FHM are stocked as easy initial forage for your newly stocked predators. They will disappear from most ponds unless you keep stocking them. Bob O has some good advice, in my opinion (IMO), of stocking more robust forage as well that can sustain a population in the pond. Bluntnose minnows (BNM) and spotfin shiners (SFS) could be good choices for your pond (not sure for Louisiana). There are others depending on what you want for predators in your pond.
Here is a link to the forum acronyms that you might find useful.
http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=92442#Post92442