i stay away from Petcos and Petsmarts now. :< i've gotten many betta in the past, and they all were healthy boys and girls. went to Petsmart, saw most of them had Swim Bladder issues. should have stayed away, but got this beautiful black-bodied boy. had bright red fins, with a smidge of blue on them. named him Mister Auron. he died that night. >.>; didn't even make it to his tank. after that, swore off chain store fish. x-x
sorry yours were sick. D: it sucks to lose a betta, no matter how long you've had him/her.