Worms will eat just about anything they can fit into their tiny mouth, and are the ultimate composter, humus maker, and soil conditioner. The primary feedstock I feed my worms is composted horse and cow manure, yard clippings-leaves, and table scraps (minus dairy and grease). Between feedings I sprinkle my own version of Worm Chow over the top of the bin. This simple recipe is great for fattening up your worms for a fishing trip or just adding some diversity to their diet and your castings. Use for your Alabama Jumpers, Red Worms, European Nightcrawlers, or African Nightcrawlers.
TexasRedWorms.com Worm Chow is:
1 part corn meal
1 part ground up oatmeal
add crushed egg shells for minerals and flavor
Texas Jumpers 
Great to have a good worm foof mix
I make a similar “grit chow”, as I call it. I don’t pay much attention to measuring the stuff, but I’d say I use equal parts of the egg shells, corn meal, and oatmeal. My additional ingredient is micronized Azomite rock dust. The worms seem to live this and the azomite is usually eaten pretty quickly. One thing that I have noticed since starting the worms On this mixture is they are much healthier looking (richer colors, more active, and large). I only have red wigglers right now (although I think some Euros may have been mixed in) and am looking to possibly start raising Alabama Jumpers. I want to be able to actually harvest them and not just have them in my garden so am still working on what type of bin would be best. I’m leaning towards cinder blocks with a plywood bottom and top. This will give them a more natural environment.
What quantities do you sell the euros and jumpers in and what are the prices? I noticed small “starter bins” is all you have in your site, but would rather that $40 went towards the worms only. I don’t need the bin.