Well.... Not all LFS got female bettas one la..... Only a few that I know of la...

If they keep all together, then more likely they are females, or juvies... If males, gone all fight to death de.....

Actually, you can check for yourself whether male or female if the fish are about 4-5 cm long.... Look under the belly.... If female, there will be a white colour protrusion, look like a button.... That's the egg tube......

Food ah.... Live food is the best of course, but guppy feed also can do.... Feed using the Hikari pellets, or frozen blood worms.... The frozen blood worms would be best.....

Don't worry, Rome was not built in one day also ma..... As long you're willing to learn, then ok....

You may also join the Betta Society of Malaysia's online forum at www.bsm.betta4u.com...... There are many masters there who will be happy to teach....