The purpose of a letter of attestation is to confirm or acknowledge an action, statement or behavior. As such, it takes the format and layout of an official letter, but with a few modifications. Basically, the sender is attesting to the knowledge and awareness of a particular situation.
Some consider L.rubellus to be the true red worm. It is also called the dung worm, or red marsh worm. This worm loves manure and compost piles but has also been found working the earth which makes it doubly effective as the two other worm varieties stay mostly at the surface of the soil.
Once you know what you are going to feed compost worms, make it easy for them to eat by chopping their food. Before compost worms start eating, their food needs to be broken down by bacteria. Smaller pieces of food makes it easier for bacteria to get to work. You can even throw everything in the blender if you wish.