Seriously! You should NOT be focusing on feeding! You didn't even read enough about them to know you're not supposed to feed them bacon. Read
www.Sarracenia.com, outside is the best place for the plant. It's probably already suffered from Wal-Mart and since you haven't read in depth it'll probably die. I may seem like a negative person but...
If you can give it good light (good light to you = horrible for them, extremely bright annoying light for you = good to them), good water (distilled or R/O, no tap water) and good soil (the medium it came in is good) no fertilizer then you can think about feeding. Small ants will work, spiders (not as big as the trap though! A daddy long leg works good for my once-dying-Wal-Mart VFT's, now they're safe), flies (if you can catch one or kill one with a flyswatter and put the carcass in the trap, then once it's in, completely closed around it, lightly squeeze the trap together multiple times, hint, lightly, this will trigger digestion), caterpillars work too, but, they will occasionally chew through the trap, unless you want to risk it you best injure it before putting it in.
If you simply put your VFT outside and keep it well-watered in a very sunny spot it will require minimal care, just watering. It will catch it's own food, if you have it in a windowsill or something it will become quite burnt and crispy, but mine recover from this, or you could slowly acclimate it from outside-bright shade, to partial sun, to full sun. May burn a little but not as much as if you just stick it out there! I am not a patient person so I just stick mine out there, and they recover quite quickly so I don't worry.