Bobby, the cycle your tank is going through is just setting your tank up with the necessary bacteria (officially known as nitrosomonas bacteria) the system needs to break down waste and detritus your future critters will excrete and you will add (in the form of excess, uneaten food). Picture the bacteria as 'animals' in your tank, they can only survive by being fed. When you added the original shrimp to decompose and jump start your cycle, you fed the bacteria. You do need to continue to feed the bacteria or they will die off. If you were to feed them another entire shrimp or two you would be severely overfeeding the present bacterial colonies and causing them to multiply even more.
Now consider this, you are past your cycle and are adding fish, inverts, and coral to your system. Those new animal additions aren't going to generate enough waste to support all the bacterial colonies your system generated during the cycle. The excess bacteria will begin to die off and settle back to a level that the waste in your tank can support.
Russ