Here is some info on what is called cecal droppings.
WikiAnswers says:
The ceca contains bacteria that break down anything in the feed that the chicken itself could not break down in its stomach.
Cecum. A blind pouch at the juncture of the small and large intestine (resembles the human appendix); plural: ceca.
Here is another explanation of what the cecum do/es. Copied from the below pdf file. I really and totally now understand why this stuff stinks SO BAD!!!!
CECAL FUNCTIONS
Cecal functioning is still only partly understood (McNab 1973, Braun and Duke 1989). Although early investigations searched for a single function of the organ, it is now clear that the cecum has the potential to act in many different ways. And depending on the species involved, the cecal morphology, and the ecological conditions under which a bird lives, those functions can be vitally important to its physiology-perhaps especially so during periods of stress. It is also apparent that the avian cecum can function in a highly efficient manner, even more efficiently than the cecum of most mammalian herbivores in terms of size and fermentation rates
(Gasaway 1976b).
The intestinal type of cecum in birds is a blind-ended sac with a meshwork of long interdigitating villi at its entrance. The majority of cecal villi apparently act as a sieve, allowing fluid and fine particles to enter the cecal lumen as colonic contents are pushed against and selectively past the cecal sphincter by retrograde waves of colonic muscle contraction (Fenna and Boag 1974a). At the same time, this material is prevented from moving up into the ileum by the contracted ileal sphincter. The colonic motility probably also rinses water-soluble substances and fine particles from the colonic contents and pushes them into the ceca (Bjornhag 1989). Because a cecum is blind-ended, its contents can be retained for longer periods than would be possible in the main (small or large) intestine through which digesta move relatively rapidly (e.g., Shibata and Sogou 1982, Clench and Mathias 1992). Held in the ceca, fluid has time to be absorbed and molecules in solution as well as solid particles can be acted on by bacteria, fungi, and other micro-organisms (Duke 1986b). It is also now appreciated that the mixing action produced by cecal wall contractions keeps the contents in general motion; cecal motility also contributes to filling and evacuating the organ (Duke 1986a, Clench and Mathias, unpubl. data). Thus, at different times and under different conditions, the cecum has been found to be a site for fermentation and further digestion of food (especially for breakdown of cellulose), for utilization and absorption of water and nitrogenous components, for microbial action of both beneficial and disease-causing organisms, and as a site for production of immunoglobulins and antibodies.
Study subjects.-Much of what is known about cecal physiology is based on studies of gallinaceous birds and waterfowl: the intestinal type of cecum. These birds (and their ceca) are large enough to study easily. Domestic and semidomestic species (chickens, quail, pheasants; domestic ducks and geese) also are readily available, they are behaviorally more amenable to manipulation, and their economic importance leads to research funding. Unfortunately, however, most domestic birds (notably chickens) have proved to be exceptionally poor models for the study of cecal function. This is probably because, through the genetic changes resulting from domestication, and the almost universal use of commercial, nutritionally complete, poultry feed (even enhanced with antibiotics), the average chicken cecum has lost much or all of its natural microflora and -fauna and its potential physiological capabilities (Thomas 1987). A chicken fed on whole natural grains that require more digestion produces results more like those from wild birds (unpubl. data). A cecectomized chicken seldom differs significantly from the intact bird in growth or other physiologic indicators (Thornburn and Willcox, 1965). Consequently, older literature abounds with contradictory and confusing reports based on studies of domestic fowl (McNab 1973). A clearer picture of natural cecal function is only now beginning to emerge.
