Thank you, DraftyAires!
I've purchased three other Bettas from a Wal-Mart when I was out of state at a university and all of them lived happy, healthy lives--but I just haven't had any luck with the Wal-Mart down the road so I'm not going to take any chances again. :S Two fish both passing within 4-10 days of purchase and the only common thing was where I bought them is just a bit too coincidental. And I highly doubt that they had two poor shipments. :3 But since I live in a larger city, I'll stick with the couple pet stores that have a good rep. with healthy fish ^-^