I was wondering does anyone know everything that both large and smallmouth bass feed on to get nice and plump for us anglers? I mean whats there main feed sources and what exactly will they feed on to survive. Any list out there?

Depending on the lake or body of water-

shad

bluegill and other sunfish

perch

herring

juvenile bass

crayfish

bugs and other crawly lake dwelling critters

salamanders

frogs

hellgrammites

gobies

and theres more i haven't listed i'm sure

but you could generally say that crawfish shad and sunfish make up a large portion of the diets of most typical bass

Wow Bass really are some hunters man, what a bunch of eaters boy..

Anyone know how often they feed?  How long can they go inbetween feedings?

I think that at least a partial answer to the when and how often they eat is dependant on but not limited to, time of year, sun, moon, and barometric pressure.

You forgot baby ducks (Cabellas has lure for this, but my wife won't let me buy one).

a bass will pretty much anything it can catch or get in his mouth

i was fishng for catfish using stink bait and was reeling in my line

the bass seen my worm sponge and hit it  im pretty sure it was because the worm was red dont think he wanted the stink bait

that is the only time i ever caught a bass using stink bait

my brother had 1 in an aquarium and it would eat anything it could fit in his mouth

its was a 125 gallon tank he had about 10 bluegil 4 bullheads

the bull heads were the first to be eaten as they were smaller

that bass would eat so many minnows it couldnt close his mouth all the way then at night it would average a bluegil a night

this bass went from about 6 inches to 12 in a matter of 2 months

non stop eating machine but then again there wasnt anybody he had to compete with either

he also eats nightcrawlers hotdogs

my brother ended up lettin him go because he couldnt keep up feedin him

Bass are opportunistic feeders, know what kind of forage is in the lake you are fishing and that should help you with lure selection